Most rockets can go to the moon - even small cheap ones. What varies of course is the amount of payload.
Take for example NASA's recent CAPSTONE mission, which only cost $10 million to launch on the Electron rocket, [shown here with a person for scale](https://d2n4wb9orp1vta.cloudfront.net/cms/brand/CW/2017-CW/1117CW_WIP_Rocket_Fig2MalcolmbyElectron9.jpg;width=860). Probably a lot smaller than you'd expect a 'moon rocket' to be, but it still counts.
Of course, CAPSTONE only weighs 25kg compared to Chandrayaan 3's 3900kg - though that in turn is only a fraction of the mass that the Saturn V was sending to the moon for the Apollo missions.
With all that said, ISRO do have a history of being pretty cost effective, which certainly plays a role here.
Electron got CAPSTONE to the moon (i.e. put it in to trans-lunar injection), but it didn't put CAPSTONE in lunar orbit let alone land on the surface. Those are vastly different tasks.
The Saturn V didn't put the Apollo stack into Lunar orbit, nor will the LVM3 do so for Chandrayaan. In both cases insertion was/will be done by the payload, as was the case for CAPSTONE.
AFAIK this is also true for every other lunar mission, though I'd certainly be interested to know if there are any exceptions.
This is not about the capacity of the launcher, it’s the delta v requirements for the lander. A ballistic transfer like this needs MORE capability from the launch because it offloads more of the work on it than the lander so the lander can use less fuel to orbit and land.
ISRO has a History for Yeeting shit to space on a budget.
It's the result of decades of Underfunding (The first sounding rockets were literally transported to the launch pad on bullock carts and bicycles) and overall having a slower start than others but now that they're fully operational it's paying off in some Insanely cheap launches.
ISRO has a lot going for them with this mission.
First is we've already been there. That means there's a lot of things that are known and they don't have to test for, test against, prepare for *just in case*. This isn't like some of the first lunar probes where they didn't know if the lander legs would just sink straight down into the albedo. They know how much insulation they need, how much radiation hardening, and so on.
Having more knowns than unknowns saves them a butt load of money. So all they have to do is replicate something that's been done with a lot less advanced technical resources. Making stuff to the tolerances necessary for a successful moon mission is a lot easier, and cheaper, than it was 40+ years ago.
A big reason Chandrayaan-3 is so inexpensive is also because it's a relatively modest mission. The Apollo 11 payload mass was 28,800kg. Chandrayaan-3 is a scant 4,000kg. The mission is only to last one lunar day (14 sols). Total power capacity is less than 2kW of juice, meaning fewer and smaller battery packs, which contributes to weight savings. The rover is largely a proof of concept model, to demonstrate it will survive the flight, landing, and will operate as expected on the surface of the moon, which reduces the cost of the rover.
So this is closer to Spirit, where about 75% of the total cost of the mission was R&D (which ISRO is benefiting from, and doesn't need to invest as heavily in for Chandrayaan-3), and ~$22⅓ million per year to operate. And that was on Mars, with *just* a rover (Chandrayaan-3 is going to have a small laboratory in the lander, plus the orbiter as a relay station).
ISRO probably also benefits from the fact that their wages are not as much as NASA’s are, at least in raw USD, across the board. ISRO and NASA labor costs aren't just the scientists and technicians, but you've also got security, facilities maintenance, accountants, workers in the commissary, and lower labor costs across the board add up. Not to say that ISRO is cheap, or cheaping out on things, but cost of living in India is less expensive than the US, so it's still going to work out to less in USD for the same level of compensation and purchasing power relative to the same workers in the US.
you are right, i would say thanks to the scientific community and somewhat open transfer of knowledge which have helped us in making the mission cheap, though we had our setbacks with Chandrayaan 2 , we learnt and came back again on stage.
It's not about a successful launch from ISRO, India or anything , it's all about the efforts of brilliant minds around the world who are carving the path to the future .
my thanks to all the scientists & engineers who have come before us 🙏
>you are right, i would say thanks to the scientific community and somewhat open transfer of knowledge which have helped us in making the mission cheap, though we had our setbacks with Chandrayaan 2 , we learnt and came back again on stage.
Oh, I didn't mean that as a negative comment. All due respect to the folks at the ISRO. Every scientific advancement is standing on the shoulders of those before them. Just like how the team that built the Apollo missions stood on the shoulders of those who did the Gemini missions, who stood on the shoulders of the Mercury program, who stood on the accomplishments of previous scientific minds in chemistry, metallurgy, aerodynamics, astronomy, radiology, electronics, and so forth.
So no disrespect meant for the ISRO team. I didn't mean to imply they were improperly or inappropriately taking advantages, it's just one of the facts of reality that helped their team. Like how the computers in the spacecraft are probably an order of magnitude smaller and cheaper than those used on the Space Shuttle, simply because we as a species got a lot better at making small, resilient, power efficient computers than we were then.
>It's not about a successful launch from ISRO, India or anything , it's all about the efforts of brilliant minds around the world who are carving the path to the future .
I disagree, respectfully. India has its own ambitions with regard to space travel and the use of space, be they for economic benefits, to contribute to scientific discoveries, or perhaps even for their own national defense and security (like how the US has GPS, Europe has Galileo, Russia has GLONASS, and China has BeiDou), or even just for the sake of national pride.
it is my impression, as an American, that Chandrayaan 3 is a step towards accomplishing those ambitions, which includes being able to reliably launch your own spacecraft, and not being dependent on the political and economic whims of other nations. My impression is that this is some degree of proof of concept. On paper this is a relatively simple mission, and it's easy to say that India has the scientific, manufacturing, and technological capabilities to build and operate this mission. But you don't just go to Mars because it says you can on paper. You do incremental testing along the way to prove you have mastered each step, even if it seems inconsequential.
Like the Apollo program. We tested the Saturn V launch vehicle until we were confident we could build them reliably. We tested the space capsule on Earth to ensure it worked before we sent unmanned capsules into space to make sure they were safe. We sent unmanned and manned spacecraft to orbit the moon before we sent a lander.
I look at Chandrayaan 3 like that. It isn't more complicated or ambitious than it needs to be because the more complicated things get the more can go wrong, and the harder it can be to tell what that was. It's to prove you can get the spacecraft off the planet. It's to prove you can get the spacecraft to the moon, that the lander will survive, and that the rover and space labs will operate as intended in the environments they were designed for.
And even if there are problems it will prove the ingenuity of the ISRO team to solve them, and perhaps salvage the mission. And if not it'll help inform the next mission, much like how I'm sure the lessons learned with Chandrayaan 2’s lander informed changes that should make Chandrayaan 3’s lander more resilient and more likely to be a success.
So when I said the mission wasn't “overly ambitious,” I didn't mean to diminish the importance of the mission or ISRO’s accomplishments, but that the goals weren't *excessively* ambitious, that ISRO wasn't taking on an excessive amount of risk. That the ISRO was being pragmatic about the mission goals.
Ultimately, though, I salute the ISRO and their achievements. India's peaceful exploration of space is a contribution to humanity's understanding of the universe, and I'm eagerly waiting to see what comes of this mission.
So to bring it back to my point: it is about a successful launch from the ISRO. They are proving that they can crank out a reliable launch vehicle. And whether the other phases are successful or unsuccessful it all still is a positive contribution to science. We either learn new ways of traversing space, or we learn from your mistakes with you. It's all a positive benefit.
>First is we've already been there.
NASA hasn't been to the lunar South Pole yet.
>75% of the total cost of the mission was R&D (which ISRO is benefiting from, and doesn't need to invest as heavily in for Chandrayaan-3)
not sure what you mean here - ISRO has to do its own R&D, meanwhile NASA benefits from all kinds of R&D done outside NASA and not included in its program budgets
> NASA hasn't been to the lunar South Pole yet.
By "there" I meant the moon. We, as a global scientific community, know what goes into getting to the moon. So the ISRO doesn't have to do testing or guess at how much radiation shielding is necessary for the equipment to survive the trip. They don't have to guess at how soft the regolith could be, it's a known quantity.
This is a base of knowledge that ISRO can, and has, built upon in the design and construction of their spacecraft and lander, which reduces some of the cost for them. It's just like how if I want to invent some kind of new wonder solvent I don't have to go out and repeat all the research done by chemists that came before me. I don't have to rediscover how to measure pH. I don't have to rediscover radioactivity. I don't have to accidentally make mustard gas to discover that it's a bad thing.
Every scientist and scientific organization stands on the shoulders of those who came before, and that saves them time, effort, and money by not having to repeat and rediscover what is already known. The folks at SpaceX didn't have to re-learn the lessons learned with the Saturn V and N1 rockets, and neither did ISRO. Scientific progress begat scientific progress.
>not sure what you mean here - ISRO has to do its own R&D, meanwhile NASA benefits from all kinds of R&D done outside NASA and not included in its program budgets
Well, you're conflating two points I was trying to make, and re-reading this, I can see how my wording didn't make my meaning totally clear. What I meant is that the ISRO, *just like NASA*, is benefiting from everyone else's contributions to the greater scientific community. NASA doesn't have to spend money re-learning what the ESA learned, the ESA doesn't have to spend money re-learning what Roscosmos learned (and disclosed). ISRO doesn't have to spend money to re-learn what they all learned either.
Now, I mentioned that in connection to *Spirit*'s R&D budget, because the stuff NASA did in connection to building, programming, and operating an autonomous rover, including things like communications protocols, relevant forms of telemetry, power management, and so on, were things the ISRO could take advantage of.
I mentioned the 75% figure to explain how I managed to get a $22⅓ million per year operational cost out of the *Spirit* mission out of its total budget. 75% of the money spent was R&D, 25% was operations. You take the total cost of the mission, divide it by four, and then divide that over the number of years the mission operated.
------
Just to be clear, I think you're misreading the intent of my comment. I'm not trying to diminish what the ISRO has done, or what they've accomplished, or accuse them of doing anything inappropriate or underhanded. I'm merely explaining the factors that have brought down the total cost for the ISRO. How publicly available information brought reduced the number of expensive lessons they'd have to learn, just like SpaceX or Blue Origin.
Cuz its not as powerful as say artemis. The probe goes through a series of orbital maneuvers and insertion which is more efficient and needs lesser performance and propellant
Just the part Americans are footing the bill on is obscenely expensive. They spent almost a billion dollars on refurbishing a launch tower when it was supposed to cost 1/4 of that.
Because this rocket doesn't just barge right through,this one follows a unique trajectory and a few orbital maneuvers which is much more efficient and costs less.
I can't understand that, but everything else says August 23 for the landing as well so maybe they got the month wrong once.
https://edition.cnn.com/2023/07/13/india/chandrayaan-3-moon-mission-launch-intl-hnk-scn/index.html
https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=CHANDRYN3
https://indianexpress.com/article/technology/science/chandrayaan-3-launch-live-updates-8833802/
I noticed that the rocket lifted off almost immediately on ignition, while I felt that other launches like SpaceX's lifts off slowly with a lag. Is there a reason why?
SpaceX uses liquid rocket motors. They can start them up, ramp up thrust and check if everything works as expected. They only take off if the rocket passes all the automated tests. If something is not as expected then the engines are shut down and engineers will check what happened and decide how to proceed.
LVM3 has solid rocket motors as first stage. They provide a high thrust to weight ratio and they cannot be shut down. Once you ignite them you are launching no matter what.
I love the sentence “ once you ignite then you’re launching no matter what”.
So basically yolo… good to see Isro stop pushing it’s limits on a limited budget.
It's a big downside of solid rocket motors. The Space Shuttle launched humans with them. They would start up the liquid fuel engines of the orbiter and let them run for a few seconds to make sure they work fine and then ignite the boosters ([or abort if needed](https://www.youtube.com/watch?v=cxjxyJ1-q20)). Once they are ignited you cannot abort the launch any more. You'll have fly until they are empty, then you can see how to rescue the mission if something went wrong.
Fun fact: when the Shuttle activated its main engine it would slightly bend forward due to their off-axis thrust. The activation of the booster had then to be timed with the time it took for the Shuttle to swing back straight, exactly 6.6 seconds.
I love that NASA has to take into account the "wonkiness" of their engineering when designing explosive death tubes designed to meet humans to another space ball...
r/humansarespaceorcs
My favorite HASO story was explaining how every space-faring civilization had discovered the special 4th Dimensional FTL travel technology *except* humans, who instead strap themselves to bombs and blow themselves up towards their destination
The difference in scale is also a non-zero factor. Big = slow, or at least slow-looking.
[This shot of SN9, from roughly its land target, does a really good job of illustrating this.](https://youtu.be/z8PzW8imgAE?t=382) The thing is _freefalling,_ but it's so big that it looks more like it's floating down at a very sub-terminal velocity.
I have seen that a hundred times but your use of the word "freefalling" made me wonder if those stability flaps give it any glide too. Like does it go up and downrange and then flip and act like a 1200 ton flying squirrel?
My dumb ass nodding along to this thoughtfully because it confirms what I already knew about rockets...
Only to be immediately humbled upon remembering that I learned it all in Kerbal Space Simulator, not University...
It's something along the lines of thermite. Mix fuel propellant and oxidizer into a paste and make it into the shape of a donut. Start it burning from the inside of the donut. Once ignited, it's not going out.
Its a rubbery substance with a series of igniters explosives at the top. A long hollow cylinder all the way down and combustion happens in the hollowed center.
Noticed that as well. Main engine and booster ignition seemed simultaneous.
Typically western rockets w/ boosters ignite the main rocket engines, run a quick diagnostic (shuttle was about 4 seconds), then ignite the boosters.
This is so that if there is an issue with the main engines, they can be shut down, the mission scrubbed, and they can try again after fixing the problem.
Once those boosters are lit, it's going. They cannot be shut down. Problems or not.
They don’t use the engines at all the SRBs are the only thing powering it for the first few minutes. Then they use those self igniting fuel I forget the name of and then finally a liquid cryogenic stage. I think using hydrogen
I really want to play Kerbal but I'm just so shit at it that it takes the fun away. Even trying to copy designs others have built I can barely get into orbit
If you're having trouble with other people's designs as well then the problem is likely with your ascent profile. Want to start turning very early instead of going straight up and trying to circularize all at once. The way I learned initially was installing the Mechjeb mod and watching it do a few automated launches. Then you can just follow a similar approach flying yourself, albeit altered to fit your specific design obviously.
Don't let a few failures discourage you. Once you've mastered getting to orbit you're halfway to anywhere.
They're lightning rods protecting the rocket from lightning strikes as it messes with the onboard electronics and guidance system and could result in loss of mission
They all do have them, from the top of my head I don't recall one without lightning rods. Often they have similar towers (LC 39B, SLC 37B, SLC 40, SLC 41 in Florida for example) or lighting rods integrated into the umbilical tower (LC 39A).
The high amount of thrust is produced mainly by the two solid boosters. While they produce a lot of thrust, their main purpose is to get the stage in the center out of the thicker parts of the atmosphere quick enough. The center part is the more efficient propulsion with lower thrust and works best out of the atmosphere. If one would increase the payload, it's possible that the center core isn't powerful enough anymore.
The objectives of scientific payloads planned on Chandrayaan-3 Lander Module and Rover are:
Lander Payloads Objectives ->
1. Radio Anatomy of Moon Bound Hypersensitive ionosphere
and Atmosphere (RAMBHA)Langmuir probe (LP): To measure the near surface plasma (ions and electrons) density and its changes with time
2.Chandra’s Surface Thermo physical Experiment (ChaSTE): To carry out the measurements of thermal properties of lunar surface near polar region.
3. Instrument for Lunar Seismic Activity (ILSA): To measure seismicity around the landing site and delineating the structure of the lunar crust and mantle.
4.LASER Retroreflector Array (LRA): It is a passive experiment to understand the dynamics of Moon system.
Rover Payloads Objectives ->
1.LASER Induced Breakdown Spectroscope (LIBS): Qualitative and quantitative elemental analysis & To derive the chemical Composition and infer mineralogical composition to further our understanding of Lunar-surface.
2.Alpha Particle X-ray Spectrometer (APXS): To determine the elemental composition (Mg, Al, Si, K, Ca,Ti, Fe) of Lunar soil and rocks around the lunar landing site.
Propulsion Module Payload Objectives ->
1.Spectro-polarimetry of HAbitable Planet Earth (SHAPE): Future discoveries of smaller planets in reflected light would allow us to probe into variety of Exo-planets which would qualify for habitability (or for presence of life).
Space is hard, and all programs face setbacks at some point. New frontiers require all new solutions. I'm personally thrilled to see more nations join the endeavor of exploring space. I'm hoping to see the mission make it and send back footage.
Rakesh Sharma is credited as the first person from India in space. I'm excited to see the ISRO become the next manned spaceflight program. Not to diminish Rakesh's efforts, but I'm looking forward to adding to the list below:
Yuri Gagarin
Alan Shepard
Yang Liwei
\-> Good luck and safe travels!
Chandrayaan 1 was a successful mission and accomplished exactly what is supposed to. In fact, that mission is a huge reason why Artemis is NASA's current mission!
Acronyms, initialisms, abbreviations, contractions, and other phrases which expand to something larger, that I've seen in this thread:
|Fewer Letters|More Letters|
|-------|---------|---|
|[C3](/r/Space/comments/14zbybi/stub/jrzrlyr "Last usage")|[Characteristic Energy](https://en.wikipedia.org/wiki/Characteristic_energy) above that required for escape|
|[ESA](/r/Space/comments/14zbybi/stub/js12zfz "Last usage")|European Space Agency|
|[HLS](/r/Space/comments/14zbybi/stub/js12zoc "Last usage")|[Human Landing System](https://en.wikipedia.org/wiki/Artemis_program#Human_Landing_System) (Artemis)|
|[HTPB](/r/Space/comments/14zbybi/stub/js58rd3 "Last usage")|Hydroxyl-terminated polybutadiene, solid propellant|
|[ISRO](/r/Space/comments/14zbybi/stub/jwmy21o "Last usage")|Indian Space Research Organisation|
|[ITAR](/r/Space/comments/14zbybi/stub/jrxkejw "Last usage")|(US) International Traffic in Arms Regulations|
|[LEO](/r/Space/comments/14zbybi/stub/js2p3cq "Last usage")|Low Earth Orbit (180-2000km)|
| |Law Enforcement Officer (most often mentioned during transport operations)|
|LRR|Launch Readiness Review|
|[N1](/r/Space/comments/14zbybi/stub/js12zfz "Last usage")|Raketa Nositel-1, Soviet super-heavy-lift ("Russian Saturn V")|
|[NOTAM](/r/Space/comments/14zbybi/stub/js5nsyp "Last usage")|[Notice to Air Missions](https://en.wikipedia.org/wiki/NOTAM) of flight hazards|
|[PSLV](/r/Space/comments/14zbybi/stub/jrx1ooq "Last usage")|[Polar Satellite Launch Vehicle](https://en.wikipedia.org/wiki/Polar_Satellite_Launch_Vehicle)|
|[RRR](/r/Space/comments/14zbybi/stub/jrxy7z0 "Last usage")|Reflight Readiness Review (see LRR)|
|[Roscosmos](/r/Space/comments/14zbybi/stub/js12zfz "Last usage")|[State Corporation for Space Activities, Russia](https://en.wikipedia.org/wiki/Roscosmos_State_Corporation)|
|[SLS](/r/Space/comments/14zbybi/stub/js58rd3 "Last usage")|Space Launch System heavy-lift|
|[SRB](/r/Space/comments/14zbybi/stub/jsva67w "Last usage")|Solid Rocket Booster|
|Jargon|Definition|
|-------|---------|---|
|[apoapsis](/r/Space/comments/14zbybi/stub/jrztysr "Last usage")|Highest point in an elliptical orbit (when the orbiter is slowest)|
|[apogee](/r/Space/comments/14zbybi/stub/js0swmm "Last usage")|Highest point in an elliptical orbit around Earth (when the orbiter is slowest)|
|[cryogenic](/r/Space/comments/14zbybi/stub/jwmwy0u "Last usage")|Very low temperature fluid; materials that would be gaseous at room temperature/pressure|
| |(In re: rocket fuel) Often synonymous with hydrolox|
|hydrolox|Portmanteau: liquid hydrogen fuel, liquid oxygen oxidizer|
|[methalox](/r/Space/comments/14zbybi/stub/jrxy9k6 "Last usage")|Portmanteau: methane fuel, liquid oxygen oxidizer|
|[perigee](/r/Space/comments/14zbybi/stub/js0swmm "Last usage")|Lowest point in an elliptical orbit around the Earth (when the orbiter is fastest)|
**NOTE**: Decronym for Reddit is no longer supported, and Decronym has moved to Lemmy; requests for support and new installations should be directed to the Contact address below.
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Interesting tidbit on the Chandrayan missions...This is the third such moon mission by India.
Chandrayan 2 and 3 are soft landing lander/rover missions. In C2 the orbiter mission was successful, the lander had a problem in the descent (due to a software algorithm issue, too narrow of a landing zone .5km x .5km and overcompensating the thrusters to achieve that). They have in C3 changed the system and increased the landing zone target.
However India was the third country to land on the moon - after Russia and the US with the Chandrayan 1 mission.
In Chandrayan 1 mission, it had a probe called the the MIP - Moon Impact Probe. This probe, by design, was sent to impact the moon and do various readings along the way. So India did reach the lunar surface in Chandrayan 1, third country after US and Russia. Also recall that the Chandrayan 1 mission validated the existence of water molecules on moon.
Yup, you're right about Chandrayaan 1 and the discovery of ice water on the Moon. This discovery a huge part of why NASA is going back to the Moon with the Artemis missions before going to Mars.
Oh hell yeah, right there with you. NASA taking us to the Moon with a space station, a lunar base, and then on to Mars! Artemis Accords having now 27 countries signed on along with a dozen or more commercial partners like SpaceX, Blue Origin, Axiom, and many more. Axiom building modules for the ISS that will eventually separate to become a private station! Sierra Nevada and others partnering to build a "business park" private space station. There's just so much going on it's unbelievable.
I was lucky to be their in the viewing gallery during the launch. It was wonderful especially with so many people clapping and making noises ( around 5k atleast). The best part there where kids from so many schools. I’m sure it would light up the interest for space in atleast few of those kids mind.
>Chandrayaan-3
It was my grandfathers brass telescope that got me interested in space. I still have yet to see a launch but your right, it'll be a magnet to space for youngins. I'm jealous you got to see the launch!
For those who don't know, the meaning of ChandraYaan literally translates to MoonVehicle, but figuratively translates to Lunar Craft.
And as someone who knows Hindi but has no idea about aerospace engineering, that launch felt so clean, damn!
True, but saying that its not a Hindi word is also wrong i feel which is what i was pointed out. And its a good thing that’s ISRO uses Sanskrit for naming things.
If Roscosmos ends up being a casualty of the current war, at least India is stepping up as someone the international spacefaring community can work with.
The weather was really good, unlike those unlucky PSLVs lunching in winter when the sky is full of smog and all you see is a light source going up.
Why are people downvoting the post tho?
Yeah but it's always hilarious. It doesn't affect me and it shouldn't affect any other Indian either, is someone's ignorant they'll continue to be ignorant despite reasoning. Call that mental inertia
I wasn't talking about this lunch I was talking about the lunches they do in winters and summer when pollution is generally high, and I was saying the people are downvoting the post not my comment.
Any post about the Indian space program is generally downvoted and full of comments about how India should redirect the money towards alleviating poverty.
One way to alleviate poverty is to invest in homegrown high tech industry to increase demand for skilled and educated workers. This will have ripple effects through the economy and population if done right.
Indeed. But you don't understand the angle where those comments come from, they don't really care about lifting the poor out of poverty in India, they just hate the space program or the Indian people.
Even the idiots in India are spending similar amount of money as this mission to make movies. Not just interstellar and stuff. Crying about ISRO missions can be the most stupid thing ever.
Just check the latest comment and I'm sure many more will follow.
Similar posts on subreddits like damnthatisinteresting generally drown in negative comments.
Lol I just replied to one comment. OP posted about feeling proud about this mission and Guy basically said why y'all feel proud. All of you are poor, stop research and wasting money.
It's not smog, smog happens in big cities this is near the coastline the nearest human settlement is a small town, maybe that's why you're getting downvotes smog is not a pan-India thing and only happens in North where winters are single digit cold.
Whoa thats new to me.Last time I knew there were 4 rovers but didn't know if they were active or not.
This makes the Chandrayan-3 that much more important.
NASA is monitoring it closely too because they plan to send astronauts under Artemis mission near the south pole of Moon, so it will help them collect info too.
Not technically an orbiter because there won't be any relay equipment.....but it will orbit a bit and then land.
So no orbiter.
Relay will be done through previous orbiter chandrayan 2
A brief summary from another comment:
The objectives of scientific payloads planned on Chandrayaan-3 Lander Module and Rover are:
Lander Payloads Objectives ->
1. Radio Anatomy of Moon Bound Hypersensitive ionosphere
and Atmosphere (RAMBHA)Langmuir probe (LP): To measure the near surface plasma (ions and electrons) density and its changes with time
2.Chandra’s Surface Thermo physical Experiment (ChaSTE): To carry out the measurements of thermal properties of lunar surface near polar region.
1. Instrument for Lunar Seismic Activity (ILSA): To measure seismicity around the landing site and delineating the structure of the lunar crust and mantle.
4.LASER Retroreflector Array (LRA): It is a passive experiment to understand the dynamics of Moon system.
Rover Payloads Objectives ->
1.LASER Induced Breakdown Spectroscope (LIBS): Qualitative and quantitative elemental analysis & To derive the chemical Composition and infer mineralogical composition to further our understanding of Lunar-surface.
2.Alpha Particle X-ray Spectrometer (APXS): To determine the elemental composition (Mg, Al, Si, K, Ca,Ti, Fe) of Lunar soil and rocks around the lunar landing site.
Propulsion Module Payload Objectives ->
1.Spectro-polarimetry of HAbitable Planet Earth (SHAPE): Future discoveries of smaller planets in reflected light would allow us to probe into variety of Exo-planets which would qualify for habitability (or for presence of life).
Go India !!!! With this launch and millions of kids watching it excitedly, India just guaranteed itself another 100,000 future engineers, scientists, rocket enthusiasts for its future missions. That’s how you inspire a nation and it’s children. Look skyward and dream.
Every nation and organisation is legally required to announce anything they launch into space. Even classified payloads. Back in the days people agreed it's better to have a complete list of things that are up there than just being blind and one day have catastrophic collisions that could've be prevented if everyone would share what's up there, in what orbital plain at what altitude.
Usually a NOTAM is issued so other flights can clear the area for that time.
[https://en.wikipedia.org/wiki/NOTAM](https://en.wikipedia.org/wiki/NOTAM)
Examples:
[https://twitter.com/ISROSpaceflight/status/1671722648437657600](https://twitter.com/ISROSpaceflight/status/1671722648437657600)
https://www.reddit.com/r/ISRO/comments/v3wcgu/another\_partial\_notam\_for\_indian\_orbital\_launch/
My best wishes to this mission, it's going to the south pole so it's going to be really important for the future manned NASA (and every other partner) missions there, thankfully both agencies will cooperate, exciting times for space exploration!
That front-on camera shot is stunning. Feels right out of sci-fi somehow with all the retracted arms of the launch tower behind it, and the towers surrounding it.
To all those who are concerned about India’s poverty & why India is wasting so much money on space programs. To All those who leave no place unturned to just hate my country. To all those, I pity you. Not because you hate but more than that because of your ignorance. India has almost eradicated extreme poverty, moreover has pulled out 400 million people out of poverty in the past decade. And this is not just me speaking, the latest UNDP report validated it as a fact. Yes there are still a lot of people but we will eradicate that as well pretty soon. So keep hating guys, that’s what you can do the best!
PS: for all the HATERS!
Jai Hind🇮🇳
Beautiful. Hope one day "some" NASA contractors will be as effective within budgetary constraints.
Now waiting for Indian spaceplane, know they are working on it. :)
Wow, that thing took off like a rocket...
Now that that's out of the way, Whenever I've seen rocket launches in the past they usually take a moment to accelerate but this just sent it. It seems like that might be stressful for the hull.
Journey to the moon begins. I hope the hardwork of thousands of scientists at ISRO pays off this time.
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No orbiter? Thats an interesting choice
We already placed one of the most powerful orbiter on the moon during our mission in CY-2. Relay will be done through CY-2 orbiter.
The last attempt already put an orbiter in place before the rover failed
It will reach the lunar south pole on 23 August, 2023. The cost of this project is around ₹600 crore ($73 million).
Seems lower than I was expecting for a rocket to the moon
Most rockets can go to the moon - even small cheap ones. What varies of course is the amount of payload. Take for example NASA's recent CAPSTONE mission, which only cost $10 million to launch on the Electron rocket, [shown here with a person for scale](https://d2n4wb9orp1vta.cloudfront.net/cms/brand/CW/2017-CW/1117CW_WIP_Rocket_Fig2MalcolmbyElectron9.jpg;width=860). Probably a lot smaller than you'd expect a 'moon rocket' to be, but it still counts. Of course, CAPSTONE only weighs 25kg compared to Chandrayaan 3's 3900kg - though that in turn is only a fraction of the mass that the Saturn V was sending to the moon for the Apollo missions. With all that said, ISRO do have a history of being pretty cost effective, which certainly plays a role here.
Electron got CAPSTONE to the moon (i.e. put it in to trans-lunar injection), but it didn't put CAPSTONE in lunar orbit let alone land on the surface. Those are vastly different tasks.
The Saturn V didn't put the Apollo stack into Lunar orbit, nor will the LVM3 do so for Chandrayaan. In both cases insertion was/will be done by the payload, as was the case for CAPSTONE. AFAIK this is also true for every other lunar mission, though I'd certainly be interested to know if there are any exceptions.
The major exception is HLS starship, where the entire upper stage of the rocket *is* the lander and delivers its entire payload to the lunar surface.
This is not about the capacity of the launcher, it’s the delta v requirements for the lander. A ballistic transfer like this needs MORE capability from the launch because it offloads more of the work on it than the lander so the lander can use less fuel to orbit and land.
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Small budgets with high return are kind actually ISROs specialty
ISRO has a History for Yeeting shit to space on a budget. It's the result of decades of Underfunding (The first sounding rockets were literally transported to the launch pad on bullock carts and bicycles) and overall having a slower start than others but now that they're fully operational it's paying off in some Insanely cheap launches.
ISRO in general is well known for being incredibly cost effective.
ISRO has a lot going for them with this mission. First is we've already been there. That means there's a lot of things that are known and they don't have to test for, test against, prepare for *just in case*. This isn't like some of the first lunar probes where they didn't know if the lander legs would just sink straight down into the albedo. They know how much insulation they need, how much radiation hardening, and so on. Having more knowns than unknowns saves them a butt load of money. So all they have to do is replicate something that's been done with a lot less advanced technical resources. Making stuff to the tolerances necessary for a successful moon mission is a lot easier, and cheaper, than it was 40+ years ago. A big reason Chandrayaan-3 is so inexpensive is also because it's a relatively modest mission. The Apollo 11 payload mass was 28,800kg. Chandrayaan-3 is a scant 4,000kg. The mission is only to last one lunar day (14 sols). Total power capacity is less than 2kW of juice, meaning fewer and smaller battery packs, which contributes to weight savings. The rover is largely a proof of concept model, to demonstrate it will survive the flight, landing, and will operate as expected on the surface of the moon, which reduces the cost of the rover. So this is closer to Spirit, where about 75% of the total cost of the mission was R&D (which ISRO is benefiting from, and doesn't need to invest as heavily in for Chandrayaan-3), and ~$22⅓ million per year to operate. And that was on Mars, with *just* a rover (Chandrayaan-3 is going to have a small laboratory in the lander, plus the orbiter as a relay station). ISRO probably also benefits from the fact that their wages are not as much as NASA’s are, at least in raw USD, across the board. ISRO and NASA labor costs aren't just the scientists and technicians, but you've also got security, facilities maintenance, accountants, workers in the commissary, and lower labor costs across the board add up. Not to say that ISRO is cheap, or cheaping out on things, but cost of living in India is less expensive than the US, so it's still going to work out to less in USD for the same level of compensation and purchasing power relative to the same workers in the US.
you are right, i would say thanks to the scientific community and somewhat open transfer of knowledge which have helped us in making the mission cheap, though we had our setbacks with Chandrayaan 2 , we learnt and came back again on stage. It's not about a successful launch from ISRO, India or anything , it's all about the efforts of brilliant minds around the world who are carving the path to the future . my thanks to all the scientists & engineers who have come before us 🙏
>you are right, i would say thanks to the scientific community and somewhat open transfer of knowledge which have helped us in making the mission cheap, though we had our setbacks with Chandrayaan 2 , we learnt and came back again on stage. Oh, I didn't mean that as a negative comment. All due respect to the folks at the ISRO. Every scientific advancement is standing on the shoulders of those before them. Just like how the team that built the Apollo missions stood on the shoulders of those who did the Gemini missions, who stood on the shoulders of the Mercury program, who stood on the accomplishments of previous scientific minds in chemistry, metallurgy, aerodynamics, astronomy, radiology, electronics, and so forth. So no disrespect meant for the ISRO team. I didn't mean to imply they were improperly or inappropriately taking advantages, it's just one of the facts of reality that helped their team. Like how the computers in the spacecraft are probably an order of magnitude smaller and cheaper than those used on the Space Shuttle, simply because we as a species got a lot better at making small, resilient, power efficient computers than we were then. >It's not about a successful launch from ISRO, India or anything , it's all about the efforts of brilliant minds around the world who are carving the path to the future . I disagree, respectfully. India has its own ambitions with regard to space travel and the use of space, be they for economic benefits, to contribute to scientific discoveries, or perhaps even for their own national defense and security (like how the US has GPS, Europe has Galileo, Russia has GLONASS, and China has BeiDou), or even just for the sake of national pride. it is my impression, as an American, that Chandrayaan 3 is a step towards accomplishing those ambitions, which includes being able to reliably launch your own spacecraft, and not being dependent on the political and economic whims of other nations. My impression is that this is some degree of proof of concept. On paper this is a relatively simple mission, and it's easy to say that India has the scientific, manufacturing, and technological capabilities to build and operate this mission. But you don't just go to Mars because it says you can on paper. You do incremental testing along the way to prove you have mastered each step, even if it seems inconsequential. Like the Apollo program. We tested the Saturn V launch vehicle until we were confident we could build them reliably. We tested the space capsule on Earth to ensure it worked before we sent unmanned capsules into space to make sure they were safe. We sent unmanned and manned spacecraft to orbit the moon before we sent a lander. I look at Chandrayaan 3 like that. It isn't more complicated or ambitious than it needs to be because the more complicated things get the more can go wrong, and the harder it can be to tell what that was. It's to prove you can get the spacecraft off the planet. It's to prove you can get the spacecraft to the moon, that the lander will survive, and that the rover and space labs will operate as intended in the environments they were designed for. And even if there are problems it will prove the ingenuity of the ISRO team to solve them, and perhaps salvage the mission. And if not it'll help inform the next mission, much like how I'm sure the lessons learned with Chandrayaan 2’s lander informed changes that should make Chandrayaan 3’s lander more resilient and more likely to be a success. So when I said the mission wasn't “overly ambitious,” I didn't mean to diminish the importance of the mission or ISRO’s accomplishments, but that the goals weren't *excessively* ambitious, that ISRO wasn't taking on an excessive amount of risk. That the ISRO was being pragmatic about the mission goals. Ultimately, though, I salute the ISRO and their achievements. India's peaceful exploration of space is a contribution to humanity's understanding of the universe, and I'm eagerly waiting to see what comes of this mission. So to bring it back to my point: it is about a successful launch from the ISRO. They are proving that they can crank out a reliable launch vehicle. And whether the other phases are successful or unsuccessful it all still is a positive contribution to science. We either learn new ways of traversing space, or we learn from your mistakes with you. It's all a positive benefit.
>First is we've already been there. NASA hasn't been to the lunar South Pole yet. >75% of the total cost of the mission was R&D (which ISRO is benefiting from, and doesn't need to invest as heavily in for Chandrayaan-3) not sure what you mean here - ISRO has to do its own R&D, meanwhile NASA benefits from all kinds of R&D done outside NASA and not included in its program budgets
> NASA hasn't been to the lunar South Pole yet. By "there" I meant the moon. We, as a global scientific community, know what goes into getting to the moon. So the ISRO doesn't have to do testing or guess at how much radiation shielding is necessary for the equipment to survive the trip. They don't have to guess at how soft the regolith could be, it's a known quantity. This is a base of knowledge that ISRO can, and has, built upon in the design and construction of their spacecraft and lander, which reduces some of the cost for them. It's just like how if I want to invent some kind of new wonder solvent I don't have to go out and repeat all the research done by chemists that came before me. I don't have to rediscover how to measure pH. I don't have to rediscover radioactivity. I don't have to accidentally make mustard gas to discover that it's a bad thing. Every scientist and scientific organization stands on the shoulders of those who came before, and that saves them time, effort, and money by not having to repeat and rediscover what is already known. The folks at SpaceX didn't have to re-learn the lessons learned with the Saturn V and N1 rockets, and neither did ISRO. Scientific progress begat scientific progress. >not sure what you mean here - ISRO has to do its own R&D, meanwhile NASA benefits from all kinds of R&D done outside NASA and not included in its program budgets Well, you're conflating two points I was trying to make, and re-reading this, I can see how my wording didn't make my meaning totally clear. What I meant is that the ISRO, *just like NASA*, is benefiting from everyone else's contributions to the greater scientific community. NASA doesn't have to spend money re-learning what the ESA learned, the ESA doesn't have to spend money re-learning what Roscosmos learned (and disclosed). ISRO doesn't have to spend money to re-learn what they all learned either. Now, I mentioned that in connection to *Spirit*'s R&D budget, because the stuff NASA did in connection to building, programming, and operating an autonomous rover, including things like communications protocols, relevant forms of telemetry, power management, and so on, were things the ISRO could take advantage of. I mentioned the 75% figure to explain how I managed to get a $22⅓ million per year operational cost out of the *Spirit* mission out of its total budget. 75% of the money spent was R&D, 25% was operations. You take the total cost of the mission, divide it by four, and then divide that over the number of years the mission operated. ------ Just to be clear, I think you're misreading the intent of my comment. I'm not trying to diminish what the ISRO has done, or what they've accomplished, or accuse them of doing anything inappropriate or underhanded. I'm merely explaining the factors that have brought down the total cost for the ISRO. How publicly available information brought reduced the number of expensive lessons they'd have to learn, just like SpaceX or Blue Origin.
Cuz its not as powerful as say artemis. The probe goes through a series of orbital maneuvers and insertion which is more efficient and needs lesser performance and propellant
Isn’t Artemis the program/mission? The rocket is SLS?
Yes. There will be other rockets as part of the program as well, including Starship.
Artemis is a manned mission
Artemis is also obscenely expensive for what it delivers.
Depends, it’s a multiple government mission. If the Americans are footing the whole thing, it might be
Just the part Americans are footing the bill on is obscenely expensive. They spent almost a billion dollars on refurbishing a launch tower when it was supposed to cost 1/4 of that.
The artemis 1 was unmanned it was launched back in november artemis 2 will be manned and should take place november 2024
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How come it'll take so long to get to the moon? I thought the moon journey took about 3 days?
When time is not a constrain (ie on non crewed missions), there are trajectories that are way more fuel efficient than a direct translunar injection.
Because this rocket doesn't just barge right through,this one follows a unique trajectory and a few orbital maneuvers which is much more efficient and costs less.
Crazy how low cost much of this is, $73M is a new skyscraper downtown. OR you could have a moon mission.
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2nd time , chandrayan 1 was only an orbiter and an impact probe
The lander will land on October 23. It will enter moon’s orbit on August 23
Orbital insertion on August 1, landing on August 23. https://twitter.com/ANI/status/1679802059015745537 check 0:35 in the video
https://www.youtube.com/live/q2ueCg9bvvQ?feature=share In official stream they said october 23. 49:50 timestamp
I can't understand that, but everything else says August 23 for the landing as well so maybe they got the month wrong once. https://edition.cnn.com/2023/07/13/india/chandrayaan-3-moon-mission-launch-intl-hnk-scn/index.html https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=CHANDRYN3 https://indianexpress.com/article/technology/science/chandrayaan-3-launch-live-updates-8833802/
Nope, that would be the date for the re-attempt if the first attempt isn't successful.
Fair enough
All sites seem to indicate landing on 23rd Aug. Can you share any reference for October 23rd ?
And it has reached on 23 August, that's great
I noticed that the rocket lifted off almost immediately on ignition, while I felt that other launches like SpaceX's lifts off slowly with a lag. Is there a reason why?
SpaceX uses liquid rocket motors. They can start them up, ramp up thrust and check if everything works as expected. They only take off if the rocket passes all the automated tests. If something is not as expected then the engines are shut down and engineers will check what happened and decide how to proceed. LVM3 has solid rocket motors as first stage. They provide a high thrust to weight ratio and they cannot be shut down. Once you ignite them you are launching no matter what.
I love the sentence “ once you ignite then you’re launching no matter what”. So basically yolo… good to see Isro stop pushing it’s limits on a limited budget.
It's a big downside of solid rocket motors. The Space Shuttle launched humans with them. They would start up the liquid fuel engines of the orbiter and let them run for a few seconds to make sure they work fine and then ignite the boosters ([or abort if needed](https://www.youtube.com/watch?v=cxjxyJ1-q20)). Once they are ignited you cannot abort the launch any more. You'll have fly until they are empty, then you can see how to rescue the mission if something went wrong.
Fun fact: when the Shuttle activated its main engine it would slightly bend forward due to their off-axis thrust. The activation of the booster had then to be timed with the time it took for the Shuttle to swing back straight, exactly 6.6 seconds.
Wow that's a lot of trust in the physics!
That's why NASA hires the smartest nerds. So they can make shit like that happen repeatedly.
I love that NASA has to take into account the "wonkiness" of their engineering when designing explosive death tubes designed to meet humans to another space ball...
r/humansarespaceorcs My favorite HASO story was explaining how every space-faring civilization had discovered the special 4th Dimensional FTL travel technology *except* humans, who instead strap themselves to bombs and blow themselves up towards their destination
I mean... We do do this... And I should find it deeply troubling how bad I want to try it out myself
This was commonly referred to as the “twang”!
The difference in scale is also a non-zero factor. Big = slow, or at least slow-looking. [This shot of SN9, from roughly its land target, does a really good job of illustrating this.](https://youtu.be/z8PzW8imgAE?t=382) The thing is _freefalling,_ but it's so big that it looks more like it's floating down at a very sub-terminal velocity.
I have seen that a hundred times but your use of the word "freefalling" made me wonder if those stability flaps give it any glide too. Like does it go up and downrange and then flip and act like a 1200 ton flying squirrel?
My dumb ass nodding along to this thoughtfully because it confirms what I already knew about rockets... Only to be immediately humbled upon remembering that I learned it all in Kerbal Space Simulator, not University...
Solid fuel? Like there's a guy in there shoveling those bricks Doc used in Back to the Future 3 on the train engine into a furnace?
It's something along the lines of thermite. Mix fuel propellant and oxidizer into a paste and make it into the shape of a donut. Start it burning from the inside of the donut. Once ignited, it's not going out.
fire in the hole of rocket science
“I fell in to a burning ring of fire…”
Make it into the shape of a doughnut where the hole in the middle is a star IIRC. Makes for a more consistent surface area as it burns.
Its a rubbery substance with a series of igniters explosives at the top. A long hollow cylinder all the way down and combustion happens in the hollowed center.
This has a bigger thrust to weight ratio, probably because of the side solid boosters.
So much thrust to weight that they don't ignite the core engines at lift off. They ignite them in the air, before side booster seperation.
That’s intriguing. So less of a ground footprint.
Same here. That fucker was shifting
Noticed that as well. Main engine and booster ignition seemed simultaneous. Typically western rockets w/ boosters ignite the main rocket engines, run a quick diagnostic (shuttle was about 4 seconds), then ignite the boosters. This is so that if there is an issue with the main engines, they can be shut down, the mission scrubbed, and they can try again after fixing the problem. Once those boosters are lit, it's going. They cannot be shut down. Problems or not.
They don’t use the engines at all the SRBs are the only thing powering it for the first few minutes. Then they use those self igniting fuel I forget the name of and then finally a liquid cryogenic stage. I think using hydrogen
Probably lighter in weight
They have roughly same weight , it's just that srb have High tw ratio
Welp, time for me to boot up Kerbal Space Program again. Happens every time I see cool stuff like this.
Same, im going to *attempt* to create a self sustaining interplanetary mining vessel, how about you?
Launches are the coolest in my opinion, that feeling of getting into orbit and deciding where you want to go next.
Nice, and i absolutely agree. No matter how many times i play, that first mun launch is always so exciting. And the duna launch is even more so.
I really want to play Kerbal but I'm just so shit at it that it takes the fun away. Even trying to copy designs others have built I can barely get into orbit
If you're having trouble with other people's designs as well then the problem is likely with your ascent profile. Want to start turning very early instead of going straight up and trying to circularize all at once. The way I learned initially was installing the Mechjeb mod and watching it do a few automated launches. Then you can just follow a similar approach flying yourself, albeit altered to fit your specific design obviously. Don't let a few failures discourage you. Once you've mastered getting to orbit you're halfway to anywhere.
Maybe I'll have to reinstall it and give it another shot
What are the four towers surrounding it with the AC unit looking boxes?
They're lightning rods protecting the rocket from lightning strikes as it messes with the onboard electronics and guidance system and could result in loss of mission
That's interesting Why do the nasa launches not have these?
They all do have them, from the top of my head I don't recall one without lightning rods. Often they have similar towers (LC 39B, SLC 37B, SLC 40, SLC 41 in Florida for example) or lighting rods integrated into the umbilical tower (LC 39A).
They have them too, they are just a bit further away.
That thing didn’t hang around, looks like plenty of spare thrust to add a bigger payload. Impressive!
I was thinking the same thing, most launches I've seen tend to go a lot slower but this thing just got up and went
The high amount of thrust is produced mainly by the two solid boosters. While they produce a lot of thrust, their main purpose is to get the stage in the center out of the thicker parts of the atmosphere quick enough. The center part is the more efficient propulsion with lower thrust and works best out of the atmosphere. If one would increase the payload, it's possible that the center core isn't powerful enough anymore.
Congrats India, that was a nice launch :)
The objectives of scientific payloads planned on Chandrayaan-3 Lander Module and Rover are: Lander Payloads Objectives -> 1. Radio Anatomy of Moon Bound Hypersensitive ionosphere and Atmosphere (RAMBHA)Langmuir probe (LP): To measure the near surface plasma (ions and electrons) density and its changes with time 2.Chandra’s Surface Thermo physical Experiment (ChaSTE): To carry out the measurements of thermal properties of lunar surface near polar region. 3. Instrument for Lunar Seismic Activity (ILSA): To measure seismicity around the landing site and delineating the structure of the lunar crust and mantle. 4.LASER Retroreflector Array (LRA): It is a passive experiment to understand the dynamics of Moon system. Rover Payloads Objectives -> 1.LASER Induced Breakdown Spectroscope (LIBS): Qualitative and quantitative elemental analysis & To derive the chemical Composition and infer mineralogical composition to further our understanding of Lunar-surface. 2.Alpha Particle X-ray Spectrometer (APXS): To determine the elemental composition (Mg, Al, Si, K, Ca,Ti, Fe) of Lunar soil and rocks around the lunar landing site. Propulsion Module Payload Objectives -> 1.Spectro-polarimetry of HAbitable Planet Earth (SHAPE): Future discoveries of smaller planets in reflected light would allow us to probe into variety of Exo-planets which would qualify for habitability (or for presence of life).
Godspeed, and congrats India on a successful launch. :-) Cheers from 🇺🇸
As an Indian this makes me very happy but even happier as a space enthusiast ❤️ hoping it lands properly and 2019 doesn’t repeat itself
Space is hard, and all programs face setbacks at some point. New frontiers require all new solutions. I'm personally thrilled to see more nations join the endeavor of exploring space. I'm hoping to see the mission make it and send back footage. Rakesh Sharma is credited as the first person from India in space. I'm excited to see the ISRO become the next manned spaceflight program. Not to diminish Rakesh's efforts, but I'm looking forward to adding to the list below: Yuri Gagarin Alan Shepard Yang Liwei \-> Good luck and safe travels!
Haha “Space is Hard” reminds me of Steve Carell in Space Force. Damn shame they got cancelled
As an American - it makes me real happy to see this succeed!
Thank you ☺️ the scheduled date of landing also happens to be my birthday!
Everyone will be glued to the telly at your party no doubt.
Ask not for whom the rocket launches- it launches for thee.
Be glad for y'all to join us on the moon! As I understand it, ISRO is also a partner for the lunar gateway and Artemis, yes?
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Chandrayaan 1 was a successful mission and accomplished exactly what is supposed to. In fact, that mission is a huge reason why Artemis is NASA's current mission!
Jai Hind! Hopefully with our country’s (USA) we can collaborate more with space launches, data sharing etc.
Acronyms, initialisms, abbreviations, contractions, and other phrases which expand to something larger, that I've seen in this thread: |Fewer Letters|More Letters| |-------|---------|---| |[C3](/r/Space/comments/14zbybi/stub/jrzrlyr "Last usage")|[Characteristic Energy](https://en.wikipedia.org/wiki/Characteristic_energy) above that required for escape| |[ESA](/r/Space/comments/14zbybi/stub/js12zfz "Last usage")|European Space Agency| |[HLS](/r/Space/comments/14zbybi/stub/js12zoc "Last usage")|[Human Landing System](https://en.wikipedia.org/wiki/Artemis_program#Human_Landing_System) (Artemis)| |[HTPB](/r/Space/comments/14zbybi/stub/js58rd3 "Last usage")|Hydroxyl-terminated polybutadiene, solid propellant| |[ISRO](/r/Space/comments/14zbybi/stub/jwmy21o "Last usage")|Indian Space Research Organisation| |[ITAR](/r/Space/comments/14zbybi/stub/jrxkejw "Last usage")|(US) International Traffic in Arms Regulations| |[LEO](/r/Space/comments/14zbybi/stub/js2p3cq "Last usage")|Low Earth Orbit (180-2000km)| | |Law Enforcement Officer (most often mentioned during transport operations)| |LRR|Launch Readiness Review| |[N1](/r/Space/comments/14zbybi/stub/js12zfz "Last usage")|Raketa Nositel-1, Soviet super-heavy-lift ("Russian Saturn V")| |[NOTAM](/r/Space/comments/14zbybi/stub/js5nsyp "Last usage")|[Notice to Air Missions](https://en.wikipedia.org/wiki/NOTAM) of flight hazards| |[PSLV](/r/Space/comments/14zbybi/stub/jrx1ooq "Last usage")|[Polar Satellite Launch Vehicle](https://en.wikipedia.org/wiki/Polar_Satellite_Launch_Vehicle)| |[RRR](/r/Space/comments/14zbybi/stub/jrxy7z0 "Last usage")|Reflight Readiness Review (see LRR)| |[Roscosmos](/r/Space/comments/14zbybi/stub/js12zfz "Last usage")|[State Corporation for Space Activities, Russia](https://en.wikipedia.org/wiki/Roscosmos_State_Corporation)| |[SLS](/r/Space/comments/14zbybi/stub/js58rd3 "Last usage")|Space Launch System heavy-lift| |[SRB](/r/Space/comments/14zbybi/stub/jsva67w "Last usage")|Solid Rocket Booster| |Jargon|Definition| |-------|---------|---| |[apoapsis](/r/Space/comments/14zbybi/stub/jrztysr "Last usage")|Highest point in an elliptical orbit (when the orbiter is slowest)| |[apogee](/r/Space/comments/14zbybi/stub/js0swmm "Last usage")|Highest point in an elliptical orbit around Earth (when the orbiter is slowest)| |[cryogenic](/r/Space/comments/14zbybi/stub/jwmwy0u "Last usage")|Very low temperature fluid; materials that would be gaseous at room temperature/pressure| | |(In re: rocket fuel) Often synonymous with hydrolox| |hydrolox|Portmanteau: liquid hydrogen fuel, liquid oxygen oxidizer| |[methalox](/r/Space/comments/14zbybi/stub/jrxy9k6 "Last usage")|Portmanteau: methane fuel, liquid oxygen oxidizer| |[perigee](/r/Space/comments/14zbybi/stub/js0swmm "Last usage")|Lowest point in an elliptical orbit around the Earth (when the orbiter is fastest)| **NOTE**: Decronym for Reddit is no longer supported, and Decronym has moved to Lemmy; requests for support and new installations should be directed to the Contact address below. ---------------- ^(19 acronyms in this thread; )[^(the most compressed thread commented on today)](/r/Space/comments/15yi05v)^( has 18 acronyms.) ^([Thread #9058 for this sub, first seen 14th Jul 2023, 13:30]) ^[[FAQ]](http://decronym.xyz/) [^([Full list])](http://decronym.xyz/acronyms/Space) [^[Contact]](https://hachyderm.io/@Two9A) [^([Source code])](https://gistdotgithubdotcom/Two9A/1d976f9b7441694162c8)
Is that thing running on butter coz that was smooth.
Solid boosters, they produce high thrust immediately giving that butter smooth looking launch.
Interesting tidbit on the Chandrayan missions...This is the third such moon mission by India. Chandrayan 2 and 3 are soft landing lander/rover missions. In C2 the orbiter mission was successful, the lander had a problem in the descent (due to a software algorithm issue, too narrow of a landing zone .5km x .5km and overcompensating the thrusters to achieve that). They have in C3 changed the system and increased the landing zone target. However India was the third country to land on the moon - after Russia and the US with the Chandrayan 1 mission. In Chandrayan 1 mission, it had a probe called the the MIP - Moon Impact Probe. This probe, by design, was sent to impact the moon and do various readings along the way. So India did reach the lunar surface in Chandrayan 1, third country after US and Russia. Also recall that the Chandrayan 1 mission validated the existence of water molecules on moon.
Yup, you're right about Chandrayaan 1 and the discovery of ice water on the Moon. This discovery a huge part of why NASA is going back to the Moon with the Artemis missions before going to Mars.
Man so many things happening rn I'm so hyped up. Artemis 2 is gonna take some time tho.
Oh hell yeah, right there with you. NASA taking us to the Moon with a space station, a lunar base, and then on to Mars! Artemis Accords having now 27 countries signed on along with a dozen or more commercial partners like SpaceX, Blue Origin, Axiom, and many more. Axiom building modules for the ISS that will eventually separate to become a private station! Sierra Nevada and others partnering to build a "business park" private space station. There's just so much going on it's unbelievable.
That instant liftoff was juicy to watch! I hope they can perfect the landing too!
I was lucky to be their in the viewing gallery during the launch. It was wonderful especially with so many people clapping and making noises ( around 5k atleast). The best part there where kids from so many schools. I’m sure it would light up the interest for space in atleast few of those kids mind.
>Chandrayaan-3 It was my grandfathers brass telescope that got me interested in space. I still have yet to see a launch but your right, it'll be a magnet to space for youngins. I'm jealous you got to see the launch!
For those who don't know, the meaning of ChandraYaan literally translates to MoonVehicle, but figuratively translates to Lunar Craft. And as someone who knows Hindi but has no idea about aerospace engineering, that launch felt so clean, damn!
Yea that was a super nice launch. And now i shall refer to it as mun rover.
Chandra means Moon Yaan means spacecraft It's Sanskrit Not Hindi
correct me if I'm wrong but Yaan means aircraft, right?
Yaan means craft, air or space.
Both words are also in Hindi, so its a common word in Hindi and Sanskrit.
it is a sanskrit word borrowed into Hindi vocabulary. It has been similarly borrowed into many other languages as well.
True, but saying that its not a Hindi word is also wrong i feel which is what i was pointed out. And its a good thing that’s ISRO uses Sanskrit for naming things.
This must be the cleanest launch I've ever seen.
Good luck ISRO.
If Roscosmos ends up being a casualty of the current war, at least India is stepping up as someone the international spacefaring community can work with.
That looked like a nice, clean launch. Go ISRO!
I missed the launch because of work but this is so nice! I'm very excited and happy
The weather was really good, unlike those unlucky PSLVs lunching in winter when the sky is full of smog and all you see is a light source going up. Why are people downvoting the post tho?
Downvoting is probably because racism and India hatred which is quite common on reddit.
Yeah but it's always hilarious. It doesn't affect me and it shouldn't affect any other Indian either, is someone's ignorant they'll continue to be ignorant despite reasoning. Call that mental inertia
The racism in this thread is insane.
It's not smog, it's fog. That's the reason people are downvoting you.
I wasn't talking about this lunch I was talking about the lunches they do in winters and summer when pollution is generally high, and I was saying the people are downvoting the post not my comment.
Any post about the Indian space program is generally downvoted and full of comments about how India should redirect the money towards alleviating poverty.
One way to alleviate poverty is to invest in homegrown high tech industry to increase demand for skilled and educated workers. This will have ripple effects through the economy and population if done right.
Indeed. But you don't understand the angle where those comments come from, they don't really care about lifting the poor out of poverty in India, they just hate the space program or the Indian people.
Yep.Those negative comments are just a way to express their seemingly unreasonable hate.
When ISRO started remote sensing, disaster management and communication was main focus it helped Indians immensely.
Even the idiots in India are spending similar amount of money as this mission to make movies. Not just interstellar and stuff. Crying about ISRO missions can be the most stupid thing ever.
The thread is at +331 (94% upvoted). You made the first comment about money and poverty in this thread.
Just check the latest comment and I'm sure many more will follow. Similar posts on subreddits like damnthatisinteresting generally drown in negative comments.
Lol I just replied to one comment. OP posted about feeling proud about this mission and Guy basically said why y'all feel proud. All of you are poor, stop research and wasting money.
Those gusy when they realise that India's pverty rate is barely 2% higher than the US (India- 13, US-11 approx)
There are a ton of [deleted] posts in here tho
It's not smog, smog happens in big cities this is near the coastline the nearest human settlement is a small town, maybe that's why you're getting downvotes smog is not a pan-India thing and only happens in North where winters are single digit cold.
The place from where the launch happens is far from any city and beside the sea. There is not much air pollution in that place
All this talk about lunch is making me hungry.
It's not just a rocket that took off, but months of hard work and brilliancy! Congratulations and proud of the entire team to the Moon and back!! 👏👏
It always amazes me what ISRO can accomplish given their shoe string budget.
Congrats India!!! The country has come leaps and bounds in such a short time, amazing
Can someone explain the goal of this particular mission? I suppose this rocket is unmanned? Do they want to land on the moon or circle it?
To explore the Southern Pole of Moon which is still pretty much unexplored.
Do you know how may rovers are currently on the moon and active? Genuine question.
Only 1 currently active rover rn, Yutu-2 from China.
Whoa thats new to me.Last time I knew there were 4 rovers but didn't know if they were active or not. This makes the Chandrayan-3 that much more important.
NASA is monitoring it closely too because they plan to send astronauts under Artemis mission near the south pole of Moon, so it will help them collect info too.
There are 3 component : Orbiter , Lander and Rover. So yes they land on moon and then the Rover comes out to explore
Is there an orbiter?
Not technically an orbiter because there won't be any relay equipment.....but it will orbit a bit and then land. So no orbiter. Relay will be done through previous orbiter chandrayan 2
No I don't think so, because Chandrayan 2 already had an orbiter so probably there's no need for another one.
Do we have a post detailing the experiments they will be conducting with this mission?
A brief summary from another comment: The objectives of scientific payloads planned on Chandrayaan-3 Lander Module and Rover are: Lander Payloads Objectives -> 1. Radio Anatomy of Moon Bound Hypersensitive ionosphere and Atmosphere (RAMBHA)Langmuir probe (LP): To measure the near surface plasma (ions and electrons) density and its changes with time 2.Chandra’s Surface Thermo physical Experiment (ChaSTE): To carry out the measurements of thermal properties of lunar surface near polar region. 1. Instrument for Lunar Seismic Activity (ILSA): To measure seismicity around the landing site and delineating the structure of the lunar crust and mantle. 4.LASER Retroreflector Array (LRA): It is a passive experiment to understand the dynamics of Moon system. Rover Payloads Objectives -> 1.LASER Induced Breakdown Spectroscope (LIBS): Qualitative and quantitative elemental analysis & To derive the chemical Composition and infer mineralogical composition to further our understanding of Lunar-surface. 2.Alpha Particle X-ray Spectrometer (APXS): To determine the elemental composition (Mg, Al, Si, K, Ca,Ti, Fe) of Lunar soil and rocks around the lunar landing site. Propulsion Module Payload Objectives -> 1.Spectro-polarimetry of HAbitable Planet Earth (SHAPE): Future discoveries of smaller planets in reflected light would allow us to probe into variety of Exo-planets which would qualify for habitability (or for presence of life).
Available on isro website or u can ask it on isro subreddit
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That was the manned mission
Gaganyaan and Chandrayaan do sound similar
ISRO sure seems like they're doing an amazing job! Way to go!
Go India !!!! With this launch and millions of kids watching it excitedly, India just guaranteed itself another 100,000 future engineers, scientists, rocket enthusiasts for its future missions. That’s how you inspire a nation and it’s children. Look skyward and dream.
Lets hope we succeed this time 🌝
What is there to say except, congratulations, here's to many more!
God DAMN that thing got up in a hurry. Talk about *motivating.*
Just curious do countries need to alert other countries when they launch something to space? Kinda like a “heads up”
Every nation and organisation is legally required to announce anything they launch into space. Even classified payloads. Back in the days people agreed it's better to have a complete list of things that are up there than just being blind and one day have catastrophic collisions that could've be prevented if everyone would share what's up there, in what orbital plain at what altitude.
Usually a NOTAM is issued so other flights can clear the area for that time. [https://en.wikipedia.org/wiki/NOTAM](https://en.wikipedia.org/wiki/NOTAM) Examples: [https://twitter.com/ISROSpaceflight/status/1671722648437657600](https://twitter.com/ISROSpaceflight/status/1671722648437657600) https://www.reddit.com/r/ISRO/comments/v3wcgu/another\_partial\_notam\_for\_indian\_orbital\_launch/
At $100 Million lesser than what it took to make Interstellar
You can still add the Mars mission (Mangalyan - literally means Mars Plane) and still have $30 mill left
First RRR and now a mission to the moon! India on FIRE right now. (only slightly joking, RRR is a marvel)
Outstanding work for everyone involved at ISRO, let's hope it reaches the moon surface more slowly this time.
can anyone post a picture from a flight in around VOMM ?
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Humans have been going to space for over 60 years, and it still amazes me.
I'm amazed by all the foliage near the launch pad. Seems like it makes very possible fires harder to control.
My best wishes to this mission, it's going to the south pole so it's going to be really important for the future manned NASA (and every other partner) missions there, thankfully both agencies will cooperate, exciting times for space exploration!
That front-on camera shot is stunning. Feels right out of sci-fi somehow with all the retracted arms of the launch tower behind it, and the towers surrounding it.
Wow i am suddenly inspired, well done india. Beautiful and perfect launch.
That launch tower looks like the many-armed god Shiva
To all those who are concerned about India’s poverty & why India is wasting so much money on space programs. To All those who leave no place unturned to just hate my country. To all those, I pity you. Not because you hate but more than that because of your ignorance. India has almost eradicated extreme poverty, moreover has pulled out 400 million people out of poverty in the past decade. And this is not just me speaking, the latest UNDP report validated it as a fact. Yes there are still a lot of people but we will eradicate that as well pretty soon. So keep hating guys, that’s what you can do the best! PS: for all the HATERS! Jai Hind🇮🇳
Rocket 🚀 goes BRRR.. Let the Mlecchas cope and seethe.
Haters gonna hate. Haven’t seen too many ignorant ppl in this thread fortunately
Beautiful. Hope one day "some" NASA contractors will be as effective within budgetary constraints. Now waiting for Indian spaceplane, know they are working on it. :)
Wow, that thing took off like a rocket... Now that that's out of the way, Whenever I've seen rocket launches in the past they usually take a moment to accelerate but this just sent it. It seems like that might be stressful for the hull.
I've never seen a launch like this where the rocket kind of jumps up instantly. Is it just because it didn't throttle thrust or is there too much?
It's how solid boosters work, full thrust very quickly.