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Space Technology & Astronomy

69 questions in Science & Technology.

Asked in 2026, 2025, 2024, 2023, 2022, 2021, 2020, 2019, 2018, 2017, 2016, 2015, 2014, 2012, 2011, 2010

2026 · Q71Science & TechnologySpace Technology & Astronomymoderate

Consider the following statements with regard to involvement of private entities in India’s space programme : 1. The Indian National Space Promotion and Authorisation Centre (IN-SPACe) is an autonomous agency formed to facilitate participation of private entities. 2. Agnikul Cosmos launched the world’s first flight using 3D-printed rocket engine. 3. Skyroot Aerospace has developed liquid fuel for GSLV. Which of the statements given above is/are correct ?

  1. (a)1 only
  2. (b)2 and 3 only
  3. (c)1 and 2 only
  4. (d)1, 2 and 3
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Official answer(c) 1 and 2 only

2025 · Q94Science & TechnologySpace Technology & Astronomymoderate

GPS-Aided Geo Augmented Navigation (GAGAN) uses a system of ground stations to provide necessary augmentation. Which of the following statements is/are correct in respect of GAGAN? I. It is designed to provide additional accuracy and integrity. II. It will allow more uniform and high quality air traffic management. III. It will provide benefits only in aviation but not in other modes of transportation. Select the correct answer using the code given below.

  1. (a)I, II and III
  2. (b)II and III only
  3. (c)I only
  4. (d)I and II only
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Official answer(d) I and II only

2024 · Q32Science & TechnologySpace Technology & Astronomymoderate

Consider the following statements : Statement-I : Giant stars live much longer than dwarf stars. Statement-II : Compared to dwarf stars, giant stars have a greater rate of nuclear reactions. Which one of the following is correct in respect of the above statements ?

  1. (a)Both Statement-I and Statement-II are correct and Statement-II explains Statement-I
  2. (b)Both Statement-I and Statement-II are correct, but Statement-II does not explain Statement-I
  3. (c)Statement-I is correct, but Statement-II is incorrect
  4. (d)Statement-I is incorrect, but Statement-II is correct
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Official answer(d) Statement-I is incorrect, but Statement-II is correct

2022 · Q40Science & TechnologySpace Technology & Astronomymoderate

If a major solar storm (solar flare) reaches the Earth, which of the following are the possible effects on the Earth ? 1. GPS and navigation systems could fail. 2. Tsunamis could occur at equatorial regions. 3. Power grids could be damaged. 4. Intense auroras could occur over much of the Earth. 5. Forest fires could take place over much of the planet. 6. Orbits of the satellites could be disturbed. 7. Shortwave radio communication of the aircraft flying over polar regions could be interrupted. Select the correct answer using the code given below :

  1. (a)1, 2, 4 and 5 only
  2. (b)2, 3, 5, 6 and 7 only
  3. (c)1, 3, 4, 6 and 7 only
  4. (d)1, 2, 3, 4, 5, 6 and 7
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Official answer(c) 1, 3, 4, 6 and 7 only

2019 · Q32Science & TechnologySpace Technology & Astronomymoderate

For the measurement/estimation of which of the following are satellite images/remote sensing data used? 1. Chlorophyll content in the vegetation of a specific location 2. Greenhouse gas emissions from rice paddies of a specific location 3. Land surface temperatures of a specific location Select the correct answer using the code given below.

  1. (a)1 only
  2. (b)2 and 3 only
  3. (c)3 only
  4. (d)1, 2 and 3
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Official answer(d) 1, 2 and 3

2019 · Q97Science & TechnologySpace Technology & Astronomyeasy

Recently, scientists observed the merger of giant ‘blackholes’ billions of light-years away from the Earth. What is the significance of this observation?

  1. (a)‘Higgs boson particles’ were detected.
  2. (b)‘Gravitational waves’ were detected.
  3. (c)Possibility of inter-galactic space travel through ‘wormhole’ was confirmed.
  4. (d)It enabled the scientists to understand ‘singularity’.
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Official answer(b) ‘Gravitational waves’ were detected.

2018 · Q61Science & TechnologySpace Technology & Astronomymoderate

With reference to the Indian Regional Navigation Satellite System (IRNSS), consider the following statements : 1. IRNSS has three satellites in geostationary and four satellites in geosynchronous orbits. 2. IRNSS covers entire India and about 5500 sq. km beyond its borders. 3. India will have its own satellite navigation system with full global coverage by the middle of 2019. Which of the statements given above is/are correct ?

  1. (a)1 only
  2. (b)1 and 2 only
  3. (c)2 and 3 only
  4. (d)None
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Official answer(a) 1 only

2018 · Q95Science & TechnologySpace Technology & Astronomymoderate

With reference to India's satellite launch vehicles, consider the following statements : 1. PSLVs launch the satellites useful for Earth resources monitoring whereas GSLVs are designed mainly to launch communication satellites. 2. Satellites launched by PSLV appear to remain permanently fixed in the same position in the sky, as viewed from a particular location on Earth. 3. GSLV Mk III is a four-staged launch vehicle with the first and third stages using solid rocket motors; and the second and fourth stages using liquid rocket engines. Which of the statements given above is/are correct ?

  1. (a)1 only
  2. (b)2 and 3
  3. (c)1 and 2
  4. (d)3 only
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Official answer(a) 1 only

2016 · Q87Science & TechnologySpace Technology & Astronomymoderate

With reference to 'Astrosat', the astronomical observatory launched by India, which of the following statements is/are correct? 1. Other than USA and Russia, India is the only country to have launched a similar observatory into space. 2. Astrosat is a 2000 kg satellite placed in an orbit at 1650 km above the surface of the Earth. Select the correct answer using the code given below.

  1. (a)1 only
  2. (b)2 only
  3. (c)Both 1 and 2
  4. (d)Neither 1 nor 2
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Official answer(d) Neither 1 nor 2

2016 · Q91Science & TechnologySpace Technology & Astronomymoderate

Consider the following statements : The Mangalyaan launched by ISRO 1. is also called the Mars Orbiter Mission 2. made India the second country to have a spacecraft orbit the Mars after USA 3. made India the only country to be successful in making its spacecraft orbit the Mars in its very first attempt Which of the statements given above is/are correct?

  1. (a)1 only
  2. (b)2 and 3 only
  3. (c)1 and 3 only
  4. (d)1, 2 and 3
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Official answer(c) 1 and 3 only

2012 · Q19Science & TechnologySpace Technology & Astronomymoderate

Which of the following is/are cited by the scientists as evidence/evidences for the continued expansion of universe? 1. Detection of microwaves in space 2. Observation of redshift phenomenon in space 3. Movement of asteroids in space 4. Occurrence of supernova explosions in space Select the correct answer using the codes given below :

  1. (a)1 and 2
  2. (b)2 only
  3. (c)1, 3 and 4
  4. (d)None of the above can be cited as evidence
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Official answer(a) 1 and 2

2012 · Q20Science & TechnologySpace Technology & Astronomyeasy

Electrically charged particles from space travelling at speeds of several hundred km/sec can severely harm living beings if they reach the surface of the Earth. What prevents them from reaching the surface of the Earth?

  1. (a)The Earth's magnetic field diverts them towards its poles
  2. (b)Ozone layer around the Earth reflects them back to outer space
  3. (c)Moisture in the upper layers of atmosphere prevents them from reaching the surface of the Earth
  4. (d)None of the statements (a), (b) and (c) given above is correct
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Official answer(a) The Earth's magnetic field diverts them towards its poles

2011 · Q3Science & TechnologySpace Technology & Astronomymoderate

Satellites used for telecommunication relay are kept in a geostationary orbit. A satellite is said to be in such an orbit when: 1. The orbit is geosynchronous. 2. The orbit is circular. 3. The orbit lies in the plane of the Earth’s equator. 4. The orbit is at an altitude of 22,236 km. Select the correct answer using the codes given below:

  1. (a)1, 2 and 3 only
  2. (b)1, 3 and 4 only
  3. (c)2 and 4 only
  4. (d)1, 2, 3 and 4
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Official answer(a) 1, 2 and 3 only

2011 · Q86Science & TechnologySpace Technology & Astronomymoderate

What is the difference between asteroids and comets? 1. Asteroids are small rocky planetoids, while comets are formed of frozen gases held together by rocky and metallic material. 2. Asteroids are found mostly between the orbits of Jupiter and Mars, while comets are found mostly between Venus and Mercury. 3. Comets show a perceptible glowing tail, while asteroids do not. Which of the statements given above is/are correct?

  1. (a)1 and 2 only
  2. (b)1 and 3 only
  3. (c)3 only
  4. (d)1, 2 and 3
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Official answer(b) 1 and 3 only