Skip to main content

Questions tagged [isro]

Questions about Indian Space Research Organization (ISRO), its missions, research projects, and other activities financed, organized, planned, managed, or otherwise arranged under this organization's umbrella.

Filter by
Sorted by
Tagged with
6 votes
2 answers
2k views

How did sulphur come up to the surface of the moon?

We know that the Chandrayaan-3 mission found the presence of sulphur on the surface of the moon. How did it come up to the surface of the moon if this element is supposed to be in the moon's core ...
Amal's user avatar
  • 164
3 votes
1 answer
380 views

Why is ISRO planning to launch Aditya-L1 if NASA has already launched the Parker Solar Probe?

If both the ISRO’s Aditya-L1 and NASA’s Parker Solar Probe have almost the same key objectives, then why is ISRO planning to launch Aditya-L1? Is there a specific reason or purpose for this decision?
Bunny Mos's user avatar
7 votes
1 answer
1k views

ISRO’s decision not to participate in the International Space Station Program

ISRO has a well-established and successful space program, with many notable achievements to its credit. However, despite its capabilities and expertise in the field of space exploration, ISRO did not ...
Mikhail Kim's user avatar
2 votes
2 answers
243 views

Where do the separated stages of ISRO Launch Vehicle Mark 3 (LVM3) end up?

ISRO Launch Vehicle Mark 3 (LVM3) is a three stage launch vehicle: First stage – S200 Boosters Second stage – L110 Third stage – C25 Where do each of these stages end up after a launch?
Ritesh Singh's user avatar
1 vote
0 answers
135 views

Is there any major difference between acceleration of solid propelled and liquid propelled rockets during launch

Few days ago, ISRO launched its PSLV-C53, which had solid first stage. (Clip here) Also, the SpaceX's starlink launched on 24th July, 2022, having liquid first stage. (Clip here) Is there any major ...
Priyansu Tank's user avatar
1 vote
1 answer
208 views

How many lives have space agencies saved? [closed]

Either the agencies themselves, lives saved by a satelitte launched by them, or how many people would have died if not for space services. How many lives have space agencies saved?
Starship - On Strike's user avatar
29 votes
6 answers
9k views

Has any space agency saved Earth from a major calamity any time?

Like diverting meteor path away from Earth, or blasting giant asteroid which was expected to impact Earth, etc. Has any space agency saved Earth from a major calamity at any time?
K. Yuta's user avatar
  • 401
10 votes
1 answer
478 views

What are the advantages of air lit solid boosters in PSLV XL?

ISRO's PSLV-XL has 6 solid strap on boosters. In a typical flight profile 4 strap on boosters are lit on ground just before liftoff. The remaining two boosters are lift 25 seconds later in air. ...
Ashvin's user avatar
  • 2,888
3 votes
0 answers
81 views

Info needed on PSLV launch adaptors and configurations

I want to understand how satellites are accommodated in PSLV. I know about few configurations and adaptors that've been used in the past. Is there any document which gives detailed info on Multiple ...
Suyash's user avatar
  • 31
2 votes
1 answer
242 views

How did India get to the Mars?

A few years back ISRO sent their orbiter to the Mars, It is known to be the biggest feat achieved by Indian Space Research Organization over the years. It special because ISRO manage to pull this out ...
KRITARTH KARAMBELKAR's user avatar
6 votes
0 answers
96 views

Has there ever been a non-negligible probability of conjunction between spacecrafts in Lunar orbit?

Apparently ISRO's Chandrayaan-2 orbiter and NASA's LRO narrowly avoided a possible conjunction event in Lunar orbit due to timely assessment and action of both agencies. https://www.isro.gov.in/update/...
Ohsin's user avatar
  • 1,812
4 votes
1 answer
287 views

How can I become an astronaut?

For EU citizens to envisage a career in space, as an astronaut, the following ESA handbook gives details about the selection process. Similar information for US citizens can be found at this NASA site ...
wayne's user avatar
  • 41
3 votes
0 answers
164 views

Did India purchase the Gaganyaan design from Russia?

Gaganyaan is an orbital crew module under development by the Indian Space Research Organisation. Sources indicate a design based on the Russian Soyuz: As of 2015 the design utilized a Soyuz-shaped ...
DrSheldon's user avatar
  • 48k
4 votes
1 answer
169 views

Does Article VI of the Outer Space Treaty apply to a Launching State?

The following question was asked and answered 3 years ago: might ISRO’s launch of Swarm’s satellites in 2018 be at least a technical violation of the Outer Space Treaty? Recall that the launch in ...
Ng Ph's user avatar
  • 2,749
2 votes
0 answers
110 views

Do sounding rockets need a license to be launched?

I am just curious to know if any kind of license is needed to launch a sounding rocket? If yes, then what kind of licenses are there for sounding rocket launches.
Mayank Jariwala's user avatar
28 votes
2 answers
3k views

Why does the Indian PSLV rocket have tiny boosters?

I have noticed that the Indian rocket PSLV has tiny strap-on boosters attached to it on the sides at the bottom. Why would these be used instead of just using a larger first stage? Why is there an ...
KarlKastor's user avatar
  • 2,163
36 votes
2 answers
5k views

Why it's news that SOFIA found water when it's already been found?

Back in 2008, India proved water on moon. India's ISRO spacecraft Chandrayaan-1 released the Moon Impact Probe (MIP) that impacted Shackleton Crater, of the lunar south pole, at 20:31 on 14 November ...
Maxwell Rhodes's user avatar
0 votes
1 answer
104 views

Is there any live classes for learning about Mars and Universe by professionals?

I have 10 year old son and he is crazy about Mars, Space, Blackholes, Universe , Rockets, and Satellites. Right now he goes to youtube and tries to learn. But we don't know which video is good and ...
Divya Rao's user avatar
-3 votes
1 answer
143 views

What's the purpose of space exploration to humans? [closed]

I don't understand why NASA, European Space Agency, ISRO etc. spend enormous amount of money/time on space exploration. Why can't they spend it on the medical side and invent vaccines to incurable ...
J. Anvil's user avatar
4 votes
2 answers
635 views

Why was ISRO's CARE reentry demonstration at 5300 m/s so slow?

This community wiki answer to What are some details of ISRO's Gaganyaan Mission currently says: Crew Module Atmospheric Re-entry Experiment (CARE) was launched on 18 December 2014 at 04:00 UTC. ...
uhoh's user avatar
  • 149k
2 votes
1 answer
403 views

What are some details of ISRO's Gaganyaan Mission?

What are the some design features of Indian Human spaceflight Programme's Gaganyaan capsule? How much of the testing is done and what are its future plans?
Navoneel Karmakar's user avatar
10 votes
1 answer
304 views

What went wrong in the Chandrayaan-2 mission with the Vikram lander?

On September 7th 2019, ISRO attempted to land a lunar lander ,Vikram, with rover , Pragyan, on the moon. It was very exciting to watch until the lander lost communication with ground station during ...
John's user avatar
  • 1,377
2 votes
1 answer
479 views

What is the purpose of the pairs of cylinders on the interstage of PSLV?

In the following images, it can be seen that the interstage (separating the first stage PS1 and the second stage PS2) of the Indian Space Research Organisation's (ISRO) Polar Satellite Launch Vehicle (...
Vishnu's user avatar
  • 3,296
7 votes
3 answers
765 views

Why is the Duration of Time spent in the Dayside greater than that of the Night side of the Moon for Chandrayaan-2 Orbiter?

The following information is from ISRO's webpage on "Detection of Argon-40 in the lunar exosphere" (Textual information relevant to my question is in bold face): The Chandra’s Atmospheric ...
Vishnu's user avatar
  • 3,296
13 votes
1 answer
591 views

What is the utility of this peanut-shaped ground facility?

The following image is from GSLV-F11 GSAT-7A Mission: Location: Second Launch Pad (SLP), Satish Dhawan Space Centre, Sriharikota, India. Please click here in case you want to see the image in ISRO's ...
Vishnu's user avatar
  • 3,296
9 votes
2 answers
2k views

Why would thermal imaging be used to locate the Chandrayaan-2 lander?

Tweets and news suggest that Chandrayaan-2 lander may have been located, using thermal imaging by the Chandrayaan-2 orbiter. Space.com: India Just Found Its Lost Vikram Lander on the Moon, Still No ...
uhoh's user avatar
  • 149k
5 votes
2 answers
257 views

Chandrayaan 2: How has life of the orbiter increased from 1 year to more than 7 years?

https://timesofindia.indiatimes.com/india/chandrayaan-2-orbiter-has-life-of-7-yrs-95-of-mission-accomplished-isro/articleshow/71026990.cms The ISRO Chairman has reported that the economic use of fuel ...
shreyase99's user avatar
40 votes
4 answers
7k views

Are there any space probes or landers which regained communication after being lost?

Recently, ISRO Vikram lander of Chandrayaan 2 lost its communication just before 2.1 km from lunar surface. ISRO staff still trying to regain the signals. Are there any space probes/landers which ...
Junaid Ahmed's user avatar
7 votes
1 answer
513 views

What are the operating systems and network stack in the Chandrayaan - 2 vehicles?

I am trying to find the information about the operating systems that are run in all of the Chandrayaan - 2 vehicles, the orbiter, lander and Rover. Are these just firmwares? Or how are different ...
soham's user avatar
  • 171
8 votes
1 answer
378 views

Did the cold temperature of the lunar south pole cause Chandrayaan-2's on board electronics to fail?

Chandrayaan-2's lander Vikram was performing nominally during descent until about 2 km before landing, but then suddenly the communication was lost. Did cold temperature of the lunar south pole cause ...
earthProgrammer's user avatar
16 votes
1 answer
575 views

Is there any way to determine the fate of Chandrayaan-2?

The lander Vikram of Chandrayaan-2 lost contact with ISRO shortly before an expected landing. Is there any way to find out if it landed without crashing? For example, are there satellites orbiting ...
William R. Ebenezer's user avatar
5 votes
2 answers
446 views

Launch capabilities of GSLV Mark III

What are the parameters of determining the launch capabilities of a rocket? Also, How does ISRO's GSLV Mark III fare against rockets like N-1, Proton, R-7 etc?
Shishir Maharana's user avatar
1 vote
0 answers
61 views

What does it take to create a space startup in India? [closed]

I wish to create a space startup in my country. Does going to an existing space company(like ISRO) help me as a founder for my startup? Consider that I have enough investment and I am ready to take ...
Yashwanth CB's user avatar
1 vote
2 answers
548 views

Chandrayaan-2 orbiter and lander communications with Earth (IDSN)

In the Seeker video India Could Be the First to Land on the Moon’s South Pole a bit after 04:20 the narrator says: Okay, well right about now you’re probably ...
uhoh's user avatar
  • 149k
4 votes
1 answer
467 views

Chandrayaan-2; time taken to get to the Moon

Depicted above is the print version of the July 02, 2019 Times of India article Why the world keeps returning to Chandamama which nicely surveys the large number of missions to the Moon. India is ...
Aditya Jain's user avatar
4 votes
1 answer
418 views

Does this rocket engine test run look healthy?

The new Ariane 6's upper stage engine "Vinci" is expected to challenge the RL-10C, which is currently the most efficient chemical rocket engine on the market. The European aerospace conglomerate aims ...
Everyday Astronaut's user avatar
2 votes
0 answers
252 views

Why does the PSLV first stage's exhaust plume turn to bluish at high altitude?

After few seconds, post liftoff(anywhere between 60s and 90s), the exhaust plume of PSLV turns into a bluish colour. This is quite evident in night launches than day launches(obviously because the ...
karthikeyan's user avatar
  • 4,479
9 votes
1 answer
1k views

Why does PSLV use four stages to get to LEO, and why do they alternate solid, liquid, solid, liquid?

Is there a simple way to explain why ISRO's PSLV launch vehicle uses four stages to get to LEO, and why they alternate as follows: ...
uhoh's user avatar
  • 149k
5 votes
1 answer
295 views

help understanding this complicated structure that will deploy HySIS

This ISRO page for the HysYS spacecraft says: HysIS, the primary satellite of PSLV-C43 mission, weighing about 380 kg, is an earth observation satellite configured around ISRO’s Mini Satellite-2 (...
uhoh's user avatar
  • 149k
5 votes
1 answer
327 views

Acceleration Profile of PSLV and GSLV

What is the way to find out the acceleration profiles of IRSO's GSLV and PSLV from launch until achieving orbit?
PIps's user avatar
  • 51
0 votes
0 answers
153 views

Why was ISRO's MOM-2 Mars orbiter mission's apoarion already decided in such an early call for proposals?

ISRO's announcement Announcement of Opportunity (AO) for future Mars Orbiter Mission (MOM-2) says in part: It is now planned to have the next orbiter mission around Mars for a future launch ...
uhoh's user avatar
  • 149k
5 votes
2 answers
423 views

Why does only SpaceX release every stage of rocket launch for the public viewing?

What I mean is SpaceX telecast every stage of rocket launch. But in NASA and ISRO, they just telecast rocket ignition launch. ISRO and NASA never does this thing why so?
Matthew Benji's user avatar
4 votes
2 answers
356 views

Why is ISRO Launch Escape System so SLOW?

I've just watched a video of the recent test and one thing I noticed is that comparing to other LES, like Mercury, Dragon, Soyuz, it looks really sluggy - like it has like 1.3-1.5 TWR. For pad abort, ...
SF.'s user avatar
  • 55.1k
38 votes
1 answer
3k views

What kind of orbit makes this wave shaped ground track?

Here is a screen shot from NY2O of the ground track from GSAT-6A (43241, 2018-027A). What kind of orbit can make this wave shaped ground track?
uhoh's user avatar
  • 149k
5 votes
2 answers
525 views

Which ISRO satellite was built in 24 hours?

In the video New ISRO Chief Rocket Man Sivan K, A Farmer's Son, Takes On SpaceX after about 08:33 the interviewer asks ISRO's chairperson Kailasavadivoo Sivan about ...
uhoh's user avatar
  • 149k
2 votes
1 answer
939 views

Why is ISRO's PSLV named "Polar"? Are there challenges for other inclinations?

The "P" in ISRO's PSLV stands for "Polar". Is there anything particularly "polar" about this launch vehicle, or is the use of the word in the name of the rocket more historical or for marketing ...
uhoh's user avatar
  • 149k
8 votes
1 answer
2k views

What are the falling parts in this ISRO rocket launch?

ISRO launched IRNSS-1I satellite yesterday using its versatile PSLV-XL. In the launch video (from 00:35 to 00:40), within five seconds of the launch, many large parts of the rocket are seen to be ...
Ritesh Singh's user avatar
4 votes
1 answer
68 views

What are the regulatory steps to be taken by a private aerospace company in India to launch a satellite?

The idea is to launch a satellite with ISRO or any other foreign launch service provider like SpaceX. The satellite in question is a simple CubeSat for basic remote sensing.
user2628110's user avatar
2 votes
1 answer
57 views

Users of GSAT-6A or similar communication satellites

Who are the actual users of the recently launched GSAT-6A(or similar communication satellites). Are these satellites only for millitary communication(using satellite phones)? I have a suspicion that ...
Vishal Sharma's user avatar
13 votes
3 answers
923 views

Might ISRO's 2018-004 launch be at least a technical violation of the Outer Space Treaty by India?

The IEEE News article FCC Accuses Stealthy Startup of Launching Rogue Satellites as well as the question What checks are supposed to be carried out to prevent illegal satellite launches? address the ...
uhoh's user avatar
  • 149k