Why in News?
Sometime in 2019 or 2020, India will send ISRO’s solar mission Aditya-L1 to a vantage point in space, known as the L1 Lagrange point, to do imaging and study of the sun.
FACTS FOR PRELIMS
Aditya – L1 is the first Indian mission to study the Sun .It will be inserted in a halo orbit around the L1, which is 1.5 million km from the Earth. The satellite carries additional six payloads with enhanced science scope and objectives.
i)Aditya-L1 is expected to be the very first to study from space two months from the time of launch, the magnetic field of the sun’s corona. (The corona is the outer layer that we see during total solar eclipses).
ii)It will be the first 100% Indian mission which will not only negotiate a challenging orbit but will also benefit the global scientific community in understanding the sun.
The Lagrangian points are positions in an orbital configuration of two large bodies where a small object affected only by gravity can maintain a stable position relative to the two large bodies.
I) A Satellite placed in the halo orbit around the Lagrangian point 1 (L1) of the Sun-Earth system has the major advantage of continuously viewing the Sun without any occultation/ eclipses.
ii)Due to a play of gravitational forces acting on it, the satellite will require little energy to keep it in place.
Source: The Hindu.