UPSC PRELIMS 2019: Chandrayaan-2

Chandrayaan-2

Topic : Chandrayaan-2

Topic in Syllabus: Science & Technology

 

Context:

Chandrayaan-2

  • India’s Geosynchronous Satellite Launch Vehicle(GSLVMkIII-M1), successfully launched the Chandrayaan-2 spacecraft into the earth orbit.
  • The chandrayaan-2 is now revolving round the earth with a perigee (nearest point to Earth) of 169.7 km and an apogee(farthest point to Earth) of 45,475 km.
  • Chandrayaan-2 is India’s second mission (after Chandrayaan-1) to the moon and comprises a fully indigenous Orbiter, Lander (Vikram) and Rover (Pragyan).

 

The Rover Pragyan is housed inside Vikram lander.

Mission:

aims to expand our knowledge and understanding of the origin and evolution of the Moon through a detailed study of its topography, mineralogy, surface chemical composition, thermo-physical characteristics and atmosphere.

After Chandrayaan-2, the Indian Space Research Organisation (ISRO) has planned the launch of its solar mission, Aditya-L1,in the first half of 2020 to study the Sun’s corona.

 

Aditya-L1

The satellite will be launched during 2019 – 2020 timeframe by PSLV-XL from Sriharikota.

Aditya L-1 is a follow on mission to Aditya 1 (that was meant to observe only the solar corona). It will provide observations of the sun’s photosphere (soft and hard X-ray), chromosphere (Ultra Violet ) and corona (Visible and Near infrared rays).

 

Sample Question:

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 l vehicle with the first and third stages l using solid rocket motors; and the second and fourth stages using liquid rocket engines.

 

Which of the statements given above is/are correct.?

a. 1 only

b. 2 and 3

c. 1 and 2

d. 3 only

 

Answer: A