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Aditya

Aditya-L1 is India's first mission dedicated to studying the Sun, launched by ISRO on September 2, 2023, and successfully reaching its halo orbit around the Lagrange point 1 (L1) on January 6, 2024. The spacecraft, equipped with seven science payloads, aims to investigate solar phenomena such as coronal heating, solar magnetic storms, and the solar wind's impact on Earth's environment. This mission seeks to enhance understanding of solar dynamics and address key questions in solar physics.

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13 views5 pages

Aditya

Aditya-L1 is India's first mission dedicated to studying the Sun, launched by ISRO on September 2, 2023, and successfully reaching its halo orbit around the Lagrange point 1 (L1) on January 6, 2024. The spacecraft, equipped with seven science payloads, aims to investigate solar phenomena such as coronal heating, solar magnetic storms, and the solar wind's impact on Earth's environment. This mission seeks to enhance understanding of solar dynamics and address key questions in solar physics.

Uploaded by

Savi Sriramulu
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Aditya-L1 (from Sanskrit: Aditya, "Sun" ) is a coronagraphy spacecraft for studying the solar atmosphere,

designed and developed by the Indian Space Research Organisation (ISRO) and various other Indian Space
Research Institutes.[1] It is orbiting at about 1.5 million km from Earth in a halo orbit around the Lagrange
point 1 (L1) between the Earth and the Sun, where it will study the solar atmosphere, solar magnetic
storms, and their impact on the environment around the Earth.

It is the first Indian mission dedicated to observe the Sun. Nigar Shaji is the project's director.Aditya-L1 was
launched aboard the PSLV C57 at 11:50 IST on 2 September 2023, It successfully achieved its intended orbit
nearly an hour later, and separated from its fourth stage at 12:57 IST. It was inserted at the L1 point on 6
January 2024, at 4:17 pm IST.

Mission objectives

The main objectives of Aditya-L1 are:

To observe the dynamics of the Sun's chromosphere and corona:

To study chromospheric and coronal heating, the physics of partially ionised plasma, of coronal mass
ejections (CMEs) and their origins, of the coronal magnetic field and heat transfer mechanisms, and flare
exchanges.

To observe the physical particle environment around its position.

To determine the sequence of processes in multiple layers below the corona that lead to solar eruptions.

To study space weather, and the origin, composition and dynamics of solar wind.
The mission took 126 Earth days after launch to reach the halo orbit around the L1 point,
which is about 1,500,000 km from Earth. The spacecraft is planned to remain in the halo
orbit for its mission duration while being maintained at a stationkeeping of 0.2–4 m/s per
year.The 1,500 kg satellite carries seven science payloads with various objectives, including
instruments to measure coronal heating, solar wind acceleration, coronal magnetometry,
origin and monitoring of near-UV solar radiation (which drives Earth's upper atmospheric
dynamics and global climate), coupling of the solar photosphere to the chromosphere and
corona, and in-situ characterisations of the space environment around Earth by measuring
energetic particle fluxes and magnetic fields of the solar wind, and solar magnetic storms.
One of the major unsolved problems in the field of solar physics is coronal heating. The
upper atmosphere of the Sun has a temperature of 2,000,000 K (2,000,000 °C; 3,600,000
°F), whereas the lower atmosphere is just 6,000 K (5,730 °C; 10,340 °F). In addition, it is not
understood exactly how the Sun's radiation affects the dynamics of the Earth's atmosphere
on a shorter as well as a longer time scale. The mission will obtain near-simultaneous
images of the different layers of the Sun's atmosphere, which will reveal the ways in which
energy is channeled and transferred from one layer to another. Thus, the mission will
enable a comprehensive understanding of the dynamical processes of the Sun and address
some of the outstanding problems in solar physics and heliophysics.

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