The Hindu news pdf- Aditya-L1 Mission [ISRO] India – GKGS 2023

The Hindu news pdf- Aditya-L1 Mission [ISRO] India – GKGS 2023

Aditya-L1, the Indian Space Research Organization’s (ISRO) first solar mission, was successfully launched recently.

The PSLV-C57 rocket was used for the launch. In a first for ISRO, the fourth stage of the PSLV was fired twice to accurately place the spacecraft into its elliptical orbit.

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About Aditya-L1 Mission

Aditya-L1 is the first Indian solar mission to investigate the Sun from a significant distance of 1.5 million km in orbit. To get to L1 point, it will take about 125 days.

Aditya-L1 is ISRO’s second astronomical observatory-class project after AstroSat (2015). The project’s route is noticeably shorter than that of Mangalyaan, India’s previous Mars orbiter mission. The spacecraft will be positioned in a halo orbit around the Sun-Earth system’s Lagrangian point 1 (L1).


  • Insights into the solar corona, photosphere, chromosphere, and solar wind are among the objectives of the project.
  • Aditya-L1’s main goal is to learn more about the behaviour of the Sun, particularly its radiation, heat, particle movement, and magnetic fields, and how these affect Earth.


Aditya-L1 Mission

Lagrange Points

Lagrange points are unique locations in space where the gravitational pull of two massive orbiting planets, like the Sun and the Earth, is balanced.This implies that a little object, like a spaceship, may stay at these locations without burning through a lot of fuel to keep its orbit stable.

There are five Lagrange Points, and each one has unique properties. These points allow a tiny mass to circle between two bigger masses in a stable manner.

Aditya-L1 Mission

Lagrange Points in the Sun-Earth System

L1: Of all the Lagrange locations, L1 is regarded as being the most important for solar observations. The main benefit of having a satellite in the halo orbit around the L1 is that it can continually see the Sun without being blocked by clouds or experiencing eclipses.
The Solar and Heliospheric Observatory Satellite (SOHO) resides there at the moment.

L2: Because it lies immediately ‘behind’ Earth as viewed from the Sun, L2 is a great place to observe the wider Universe without being distracted by Earth’s shadow.
Close to L2, the James Webb Space Telescope circles the Sun.

L3: It gives the possibility of observing the far side of the Sun because of its location behind the Sun, across from Earth, and just outside of Earth’s orbit.

L4 and L5: The objects there hold their places steadily, creating an equilateral triangle with the two bigger entities. They are often employed by space observatories, like those used to examine asteroids.

The L1, L2, and L3 points are unstable, which means that even a slight disturbance might cause an item to veer off course. Therefore, in order to retain their placements, satellites circling these spots require regular course adjustments.

Significance of Aitiya L1 Misson

  • The Sun, which is at the centre of our solar system, has a significant impact on how all other celestial bodies behave. Understanding the dynamics of our solar neighbourhood is improved by research on the Sun.
  • Solar activity may affect the space environment around Earth, including solar flares and coronal mass ejections. Foreseeing and preventing probable outages of electrical grids, navigational systems, and communication networks requires a thorough understanding of these phenomena.
  • Investigating the complex behaviour of the Sun, including its magnetic fields, heating processes, and plasma dynamics, aids in the development of both astrophysics and basic physics.
  • A natural fusion reactor is the Sun, which advances energy research. Our efforts to develop clean and sustainable fusion energy on Earth can be influenced by the knowledge obtained from researching its core and nuclear processes.
  • Satellites and spacecraft are impacted by solar radiation and solar wind. Better spacecraft design and operation are made possible by understanding these solar interactions.

Source- Indian Express

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