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Important Facts For Prelims


  • 27 May 2023
  • 4 min read

Why in News?

Recently, the chairman of the Indian Space Research Organisation (ISRO), S Somanath, addressed students and scientists during the 'User Meet of XPoSat' at the ISRO headquarters in Bengaluru.

  • He emphasised the importance of effectively utilizing data from science-based space missions and encouraged Indian scientific institutions to identify talented students and motivate them to work with emerging data technologies like XPoSat.

What is XPoSat?

  • About:
  • XPoSat is a collaboration between the ISRO and the Raman Research Institute (RRI), Bengaluru, Karnataka.

  • Scientific Payloads of XPoSat:
    • XPoSat will carry two scientific payloads: Polarimeter Instrument in X-rays (POLIX) and X-ray Spectroscopy and Timing (SPECT) in a low Earth orbit.
      • POLIX payload will enable the measurement of polarimetry parameters such as the degree and angle of polarization in the medium X-ray energy range of 8-30 keV photons originating from astronomical sources.
      • SPECT payload will provide valuable timing and spectroscopic information within the energy range of 0.8-15 keV of X-ray photons.
  • Importance in Understanding Astronomical Sources:
    • Polarimetry measurements offer an excellent diagnostic tool for comprehending the emission processes from various astronomical sources.
    • By combining polarimetric observations with spectroscopic and timing measurements, researchers anticipate overcoming the limitations of the present understanding of astronomical emission processes.
  • Status of XPoSat:
    • Testing for XPoSat is nearing completion, and the mission is in its advanced stages and is scheduled to be launched sometime in the year 2023.

Other Upcoming Missions of ISRO:

  • Aditya-L1:
    • India's first dedicated solar observatory mission, scheduled for June-July 2023
  • Chandrayaan-3:
    • A follow-up mission to Chandrayaan-2, scheduled for June 2023.
  • Shukrayaan-1:
    • India's first orbiter mission to Venus.
  • Gaganyaan Mission:
    • A manned space mission that will put astronauts 400km in orbit.
  • NISAR:
    • A joint Earth-observing mission between ISRO and NASA that will provide information on global environmental changes.

UPSC Civil Services Examination, Previous Year Question (PYQ)


Q. Which of the following pairs is/are correctly matched? (2014)

Spacecraft Purpose

  1. Cassini-Huygens Orbiting the Venus and transmitting data to the Earth
  2. Messenger Mapping and investigating the Mercury
  3. Voyager 1 and 2 Exploring the outer solar system

Select the correct answer using the code given below:

(a) 1 only
(b) 2 and 3 only
(c) 1 and 3 only
(d) 1, 2 and 3

Ans: (b)

Source: IE

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