Aditya L1 is the first space-based observatory-class solar mission launched by ISRO.

• The spacecraft is placed in a halo orbit around the Lagrangian point 1 (L1) of the Sun-Earth system.
• From the L1 point, satellites have the major advantage of continuously viewing the Sun without any occultation/ eclipse.
• Spacecraft carries seven payloads to observe the photosphere, chromosphere, and the outermost layers of the Sun (the corona) using electromagnetic and particle detectors.
• Mission will help in understanding the Coronal Heating and Solar Wind Acceleration.

What do you need to know about the Sun?

• The sun is the nearest star and the largest object in the solar system.
• The estimated age of sun is about 4.5 billion years.
• It is composed of hydrogen and helium gases.
• The constant flow of particles from the sun is known as solar wind and is mostly composed of high-energy protons.

Layers of Sun

Source: The Hindu