ISRO to launch Aditya-L1 

  • Indian Space Research Organisation (ISRO) announced that Aditya­L1 will be launched on September 2. 

About Aditya-L1

  • It is India’s first space based observatory to study the sun
  • The spacecraft will be placed in a halo orbit around the Lagrange point 1 (L1) of the sun­earth system, which is about 1.5 million km from the earth.

7 Payloads: 

  • The spacecraft carries seven payloads to observe the hotosphere, chromosphere and the outermost layers of the sun. 
  • They are
  • Visible Emission Line Coronagraph (VELC)
  • Solar Ultraviolet Imaging Telescope (SUIT)
  • Solar Low Energy X­ray Spectrometer (SoLEXS)
  • High Energy L1 Orbiting X­ray Spectrometer (HEL1OS)
  • Aditya Solar wind Particle Experiment (ASPEX)
  • Plasma Analyser Package For Aditya (PAPA)
  • Advanced Triaxial High Resolution Digital Magnetometers.

Advantages of L1 point

  • A satellite placed in the halo orbit around the L1 point has the major advantage of continuously viewing the sun without any occultation/eclipses. 
  • It will help in observing the solar activities and its effect on space weather in real time.

Other Solar Missions 

Space Agency/Country Mission Date
National Aeronautics and Space Administration (NASA)/US  Parker Solar Probe August 2018
NASA and European Space Agency (ESA) The Solar Orbiter February 2020
NASA and JAXA Transient Region and Coronal Explorer (TRACE), along with NASA, in. 1998
NASA, ESA and JAXA (Japan Aerospace Exploration Agency) Solar and Heliospheric Observatory (SOHO). December 1995
JAXA Hinotori (ASTRO-A) 1981
Yohkoh (SOLAR-A)  1991
Hinode (SOLAR-B) 2006
ESA Ulysses October 1990
China Advanced Space-based Solar Observatory October 9, 2022
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