Will ISRO's Aditya L1 touch the Sun? No. Which solar probe has come closest | Latest News India - Hindustan Times
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Will ISRO's Aditya L1 touch the Sun? No. Which solar probe has come closest

By | Edited by Aryan Prakash
Sep 02, 2023 11:15 AM IST

ISRO's Aditya L1 set for launch on Saturday, will not land on the Sun, but be positioned at the L1 point in the Earth-Sun system.

The Indian Space Research Organisation (ISRO) has announced that preparations for the launch of Aditya L1 are progressing smoothly, and everything is set for liftoff today. In a release featuring pictures of the launch rehearsal, the Indian space agency informed that the Polar Satellite Launch Vehicle (PSLV) has completed its internal checks and is fully prepared for its 59th mission – to deploy India's inaugural solar mission into a low earth orbit.

ISRO's Aditya L1 (Left) and NASA's Parker solar probe (Representative Image)
ISRO's Aditya L1 (Left) and NASA's Parker solar probe (Representative Image)

Will Aditya L1 land on the Sun? No. Unlike Chandrayaan 3, where the Vikram lander, with Pragyan rover inside, softly touched down near the lunar south pole, the solar probe will instead be positioned at the first Lagrange point in the Earth-Sun system.

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The distance to the L1 point is 1.5 million km, a span anticipated to be traversed by the spacecraft through various manoeuvres over the course of 4 months, ISRO said. Remarkably, this distance represents only 1 per cent of the overall 150 million km separation between Earth and the Sun.

ALSO READ- ISRO's Aditya L1 launch live: How to watch

NASA's Parker probe ‘touched’ Sun

In December 2021, a spacecraft touched the Sun for the first time in history. The National Aeronautics and Space Administration or NASA's Parker Solar Probe navigated through the Sun's upper atmosphere, known as the corona, and sampled particles and magnetic fields within. The Parker Probe reached to about 7.8 million kilometres from the Sun's surface.

Since then, it has been executing loops in a highly elliptical orbit around the Sun, gradually drawing nearer with each orbit and relaying an abundance of observational data.

How close will NASA's Parker probe go?

At present, the NASA probe, which orbits the Sun, is situated approximately 50 million km away from Earth. It is currently making loops around Venus as part of preparations for an upcoming close encounter with the Sun. According to the most recent updates from NASA, the Parker Probe successfully passed by Venus on August 21, employing the planet's gravity to align itself for an upcoming series of record-setting flights around the Sun, slated to commence next month. The US space agency has confirmed that the probe remains on track to execute its closest flybys of the Sun thus far.

ALSO READ: NASA shares before and after image of Sutlej River flooding

Parker Solar Probe will employ Venus flybys to gradually reduce its orbit around the Sun, ultimately approaching as close as 6.16 million kilometres from its surface. This proximity places it well within the orbit of Mercury and approximately seven times nearer than any previous spacecraft.

During its anticipated closest approach in June 2025, Parker Solar Probe will be hurtling around the Sun at an astonishing speed of approximately 692,000 km per hour! To put this into perspective, it's fast enough to travel from New Delhi to Lahore in just two seconds.

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