Aditya-L1 Mission: ચંદ્ર બાદ હવે સૂર્ય મિશનની આવી ગઇ તારીખ, 2 સપ્ટેમ્બરે થશે લોન્ચ FULL DETAILS
What is the Aditya-L1 mission?
The Aditya-L1 mission will see the Polar Satellite Launch Vehicle (PSLV) lift the 1,475-kg spacecraft into an elliptical orbit around Earth. The spacecraft, which will carry seven scientific payloads, is more than twice as light as the one on the Moon.
Aditya L1 will be the first space-based Indian mission to study the Sun. The spacecraft will be placed in a halo orbit around the Sun-Earth system's Lagrange point 1 (L1), which is about 1.5 million km from Earth. The main advantage of a satellite placed in a halo orbit around the L1 point is to see the Sun continuously without any occultation/eclipse. This will provide the added benefit of observing solar activity and its impact on space weather in real time. The spacecraft carries seven payloads to observe the photosphere, chromosphere, and outermost layers of the Sun (the corona) using electromagnetic and particle and magnetic field detectors. Using the special vantage point L1, four payloads look directly at the Sun and the remaining three payloads study particles and fields in-situ at Lagrange point L1, thus providing an important scientific study of the propagating effect of solar motion in the interplanetary medium.
Suits of Aditya L1 payloads are expected to provide the most important information to understand the problem of coronal heating, coronal mass ejection, pre-flare and flare activities and their characteristics, dynamics of space weather, propagation of particles and fields etc.
More details
Aditya-L1 Mission Booklet
Aditya-L1 mission and science payloads
evaluation
Objectives of Science:
The main science objectives of the Aditya-L1 mission are:
Study of solar upper atmospheric (chromosphere and corona) dynamics.
Study of chromospheric and coronal heating, physics of partially ionized plasma, initiation of coronal mass ejections and flares
Observe in-situ particle and plasma environments providing data for studying particle dynamics from the Sun.
Physics of the solar corona and its heating mechanism.
Diagnostics of Coronal and Coronal Loops Plasma: Temperature, Velocity and Density.
Development, dynamics and origin of CMEs.
Identify the sequence of processes occurring at multiple levels (chromosphere, base, and extended corona) that ultimately lead to solar flare events.
Magnetic field topology and magnetic field measurements in the solar corona.
Drivers for space weather (origin, structure and dynamics of the solar wind.
As defined by NASA, a Lagrange point is a position in space where "the gravitational pull of two large masses equals the centripetal force required to move a smaller object with them. These points in space are used to reduce the fuel consumption required by spacecraft to stay in position. can be." Basically, this means that at that point, the gravitational attraction and repulsion between the two celestial bodies is such that an object placed between them will effectively remain in the same relative position while orbiting them.
Lagrange points are named after Italian-French mathematician Josephi-Louis Lagrange and there are five of them: L1, L2, L3, L4 and L5. According to NASA, "The L1 point of the Earth-Sun system provides an uninterrupted view of the Sun and is currently home to the Solar and Heliospheric Observatory satellite SOHO."
ઈસરો ની સાઇટ પર લાઈવ જોવા અહી ક્લિક કરો
NASA's James Webb Space Telescope is on L2. “The special feature of this orbit is that it allows the telescope to remain in line with the Earth as it orbits the Sun. This allows the satellite's large sunshield to shield the telescope from light and heat from the Sun and Earth (and Moon)," says NASA's website.
What will the Aditya-L1 mission study?
The spacecraft carried seven payloads to observe the photosphere [the deepest layer of the Sun that we can directly observe], the chromosphere [the layer about 400 km and 2,100 km above the photosphere] and the Sun's outermost layers (the corona). Electromagnetic and particle and magnetic field detectors. Of the seven payloads, four will study the Sun directly, and the remaining three will study particles and fields located at the Lagrange point L1, "thus providing an important scientific study of the effect of propagation of solar dynamics in the interplanetary medium," ISRO said. .
"The suits of Aditya L1 payloads are expected to provide the most important information to understand the problem of coronal heating, coronal mass ejection, pre-flare and flare activities and their characteristics, dynamics of space weather, propagation of particles and fields etc." ISRO release says.
Why is it important to study the Sun?
Every planet, including Earth and exoplanets outside the solar system, evolves — and this evolution is driven by its parent star. Solar weather and environment affect the weather of the entire system. These weather variations can change the orbits of satellites or shorten their lives, interfere or damage them.
