BITES Expert Talk on Lagrange Points and Aditya L1
The Board for IT Education Standards (BITES) promotes, encourages, and deep dives into industry-academia equations on a number of platforms. BITES Expert Talk on “Lagrange Points and Aditya L1” was organised on 22.9.2023 between 2PM-3.30PM at AIeMS Campus for the faculty of AIeMS and other colleges. The Resource person, Dr. R Ranganath, Ex-Project Director, SPADEX, URSC & Hon Adjunct Professor, NIAS briefed about the Aditya L1 – the first space-based observatory class Indian solar mission to study the Sun.
Topics Discussed during the Session:
Why study Sun from Space?
- The sun is the nearest star and therefore can be studied in much more detail as compared to other stars. By studying the sun, we can learn much more about stars in our Milky Way as well as about stars in various other galaxies.
What is ADITYA L1 Mission and where will it be placed?
- Aditya L1 is the first space-based observatory class Indian solar mission to study the Sun.
- The spacecraft is planned to be placed in a halo orbit around the Lagrangian point 1 (L1) of the Sun-Earth system, which is about 1.5 million km from the Earth.
- A satellite placed in the halo orbit around the L1 point has the major advantage of continuously viewing the Sun without any eclipse. This will provide a greater advantage of observing the solar activities continuously.
What are the payloads (Instruments) part of Aditya L-1 and their functions?
The Aditya-L1 mission carries a suit of seven scientific payloads to carry out systematic study of the Sun.
- The Visible Emission Line Coronagraph (VELC) studies the solar corona and dynamics of Coronal Mass Ejections.
- The Aditya Solar wind Particle EXperiment (ASPEX) and Plasma Analyser Package for Aditya (PAPA) payloads study the solar wind and energetic ions, as well as their energy distribution.
- The Solar Low Energy X-ray Spectrometer (SoLEXS) and The High Energy L1 Orbiting X-ray Spectrometer (HEL1OS) studies the X-ray flares from the Sun over a wide X-ray energy range.
- The Magnetometer payload is capable of measuring interplanetary magnetic fields at the L1 point.
What is the significance of Aditya L1 Mission?
- The mission aims to provide valuable insights into the solar corona, photosphere, chromosphere, and solar wind. The primary objective of Aditya-L1 is to gain a deeper understanding of the Sun’s behaviour, including its radiation, heat, particle flow, and magnetic fields, and how they impact Earth.
What are the challenges associated with Aditya L1 Mission?
Aditya L1 Mission is India’s first attempt at a solar space expedition. It comes with its fair share of challenges, they have been discussed below:
- The distance between Sun and Earth is huge (approximately 15 crore km).
- The chances of the collision of this satellite in space are high since it has moving components, and it is a major challenge for Aditya L1 Mission.
- Though Aditya L1 will be placed quite far from the Sun, the super-hot temperatures and radiations in the sunny weather can adversely affect the mission.
What are the other missions launched for Solar study?
Following are some important missions launched by space agencies of different countries exploring the Sun
- National Aeronautics and Space Administration (NASA), the U.S. space agency, launched the Parker Solar Probe in August 2018. In December 2021, Parker flew through the Sun’s upper atmosphere, the corona, and sampled particles and magnetic fields there.
- In 2006, JAXA, the Japan’s space agency, launched Hinode (SOLAR-B) which was the successor to Yohkoh (SOLAR-A), the orbiting solar observatory. Japan launched it in collaboration with the U.S. and the U.K. The objective of Hinode, an observatory satellite, is to study the impact of the Sun on the Earth.
- The Advanced Space-based Solar Observatory (ASO-S) was successfully launched by National Space Science Center, Chinese Academy of Sciences (CAS), on October 8, 2022.
At the end, Q&A session was very interesting and interactive and it also provoked a huge interest among faculties and students.
Dr. Ranganath experience in studying Lagrange points and the solar corona were instrumental in understanding the objectives of Lagrange Points and Aditya L1 Mission.
RESOURCE PERSON
- Dr. R Ranganath, Ex-Project Director, SPADEX, URSC & Hon Adjunct Professor, NIAS
COORDINATOR
BENEFICIARY
- Faculty of AIeMS and various faculties of BITES