ISRO's Aditya L1 launch at 11:50 am today:

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After the successful landing of Chandrayaan-3, the Indian Space Research Organization (ISRO) is gearing up to study the Sun. For this, Aditya L1 spacecraft will be launched from Sriharikota by PSLV XL rocket at 11.50 am today.

Aditya L1 will be the first Indian mission to study the Sun. The spacecraft will reach Lagrange Point-1 (L1) 4 months after launch. The eclipse has no effect on this point, which makes it easy to study the Sun from here. The estimated cost of this mission is Rs 378 crore.

Pictures of Aditya L1…

Here is the brochure: https://t.co/5tC1c7MR0u

and a few quick facts:
🔸Aditya-L1 will stay approximately 1.5 million km away from Earth, directed towards the Sun, which is about 1% of the Earth-Sun distance.
🔸The Sun is a giant sphere of gas and Aditya-L1 would study the… pic.twitter.com/N9qhBzZMMW

— ISRO (@isro) September 1, 2023

What is Lagrange Point-1 (L1)?
The Lagrange point is named after the Italian-French mathematician Joseph-Louis Lagrange. This is colloquially called L1. There are five points between the Earth and the Sun, where the gravitational force of the Sun and the Earth balances out and becomes centrifugal force.

In such a situation, if an object is kept at this place, it easily remains fixed between the two and the energy is also less. The first Lagrange point is at a distance of 1.5 million km between the Earth and the Sun.

The reception at the L1 point is ineffective, so it is being sent here
The Aditya spacecraft will be placed in a halo orbit between the Sun and Earth. ISRO says that a satellite placed in a halo orbit around the L1 point can see the Sun continuously without any eclipse. It can also monitor real-time solar activity and space weather.

Aditya L1’s 7 payloads will capture the Sun
The Aditya spacecraft will observe storms on the Sun by staying at the Sun-Earth L1, or Lagrangian point. It will probe orbits around the Lagrangian point, photosphere, chromosphere and outermost layer of the corona via 7 payloads from different web bands.

Aditya L1’s seven payloads will provide information to understand coronal heating, coronal mass ejections, pre-flare and flare activity characteristics, particle motion and space weather. Aditya L-1 will study the solar corona and its heating mechanism.

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