Aditya-L1: When Will India's First Solar Mission Reach Its Destination? What Path Will It Take? All You Need To Know
<p><span style="font-weight: 400;">Aditya-L1, India’s first solar mission, will be launched on September 2, 2023, at 11:50 am IST, atop an XL-PSLV (Polar Satellite Launch Vehicle) rocket, from Satish Dhawan Space Centre, Sriharikota, Andhra Pradesh. The Indian Space Research Organisation (ISRO) aims to place the space-based solar observatory in a halo orbit around a special point that lies along the Sun-Earth line. This point is the Lagrange point 1 (L1). It is a special point in space where the gravitational forces exerted by the Sun and the Earth on the Aditya-L1 spacecraft will be balanced, allowing the observatory to remain in a stable position, minimise energy expenditure by saving fuel, and obtain an uninterrupted view of the Sun for the entirety of its mission life.</span></p> <p><span style="font-weight: 400;">Aditya-L1 will study the different layers of the Sun, the mechanisms of coronal heating and coronal mass ejections, and magnetic fields around L1.</span></p> <p><strong>MUST READ | <a title="Aditya-L1 Will Be Placed 1.5 Million Kilometres From The Earth. Know The Significance Of This Distance" href="https://ift.tt/wGdZni8" target="_self">Aditya-L1 Will Be Placed 1.5 Million Kilometres From The Earth. Know The Significance Of This Distance</a></strong></p> <h3><span style="color: #ff5e00;"><strong>How long Aditya-L1 will take to reach its destination, and what its path will be like</strong></span></h3> <p><span style="font-weight: 400;">Aditya-L1 will take about four months to reach L1. The spacecraft will be located 1.5 million kilometres from Earth, and about 148.5 million kilometres from the Sun.</span></p> <p><span style="font-weight: 400;">Aditya-L1's trajectory towards the Sun will be a complex one, and will involve several phases. The path is not straight, and will include a lot of twists. After being launched, Aditya-L1 will be placed in a low-Earth orbit, which will be circular. This stage is known as the Earth-centred orbit transfer. </span></p> <p><strong>MUST READ |<a title=" Aditya-L1: What Makes India's First Space-Based Solar Observatory To Study The Sun Unique" href="https://ift.tt/r5gSAZ9" target="_self"> Aditya-L1: What Makes India's First Space-Based Solar Observatory To Study The Sun Unique</a></strong></p> <p><span style="font-weight: 400;">Aditya-L1 will perform three Earth-bound orbit-raising manoeuvres, or perigee burns, to ensure that after each step, the orbit becomes more elliptical. In the case of Chandrayaan-3, orbit-raising manoeuvres were performed to ensure that after each perigee burn, the orbit became more circular. Aditya-L1 will use Earth's gravitational field to perform these manoeuvres. </span></p> <p><span style="font-weight: 400;"> </span></p> <figure class="image"><img src="https://ift.tt/O5zPu8T" alt="After Aditya-L1 inserts itself into the halo orbit around L1, and stabilises itself, the spacecraft will start orbiting L1. This is a special point where the gravitational pulls from the Earth and the Sun balance each other out, as a result of which Aditya-L1 will simply hover around L1. (Photo: Instagram/@ISRO)" /> <figcaption>After Aditya-L1 inserts itself into the halo orbit around L1, and stabilises itself, the spacecraft will start orbiting L1. This is a special point where the gravitational pulls from the Earth and the Sun balance each other out, as a result of which Aditya-L1 will simply hover around L1. (Photo: Instagram/@ISRO)</figcaption> </figure> <p><span style="font-weight: 400;">After the three orbit-raising manoeuvres, Aditya-L1 will exit Earth's gravitational sphere of influence (SOI), and start travelling towards L1 using onboard propulsion. </span></p> <p><span style="font-weight: 400;">The stage after exiting Earth's SOI is known as the cruise phase. </span></p> <p><strong>ALSO READ | <a title="Everything About Aditya-L1" href="https://ift.tt/MqYlkiR" target="_self">Everything About Aditya-L1</a></strong></p> <p><span style="font-weight: 400;">"After Aditya-L1 exits Earth's sphere of influence, the Sun's gravitational pull will take over. This part takes some time. Once that is done, Aditya-L1 will enter the cruise phase,"</span><em><span style="font-weight: 400;"> Manish Purohit, a former ISRO scientist, told ABP Live. </span></em></p> <p><span style="font-weight: 400;">Describing the cruise phase as a slow and steady ride through space, <em>Purohit explained</em> that the phase will help Aditya-L1 reach the special spot required for approaching L1.</span></p> <p><strong>ALSO READ | <a title="Chandrayaan-3: Vikram And Pragyan Are Halfway Through Their Mission Life. Know What Happens At The Mission's End" href="https://ift.tt/OBml4x1" target="_self">Chandrayaan-3: Vikram And Pragyan Are Halfway Through Their Mission Life. Know What Happens At The Mission's End</a></strong></p> <p><span style="font-weight: 400;">Once Aditya-L1 reaches the special spot, the spacecraft's engines will be used to change its path, <em>said Purohit.</em> "This new path takes Aditya-L1 to the L1 halo orbit around L1."</span></p> <p><span style="font-weight: 400;">According to Purohit, it will take Aditya-L1 about 109 days to reach the L1 halo orbit.</span></p> <p><strong>MUST READ: EXCLUSIVE | <a title="Chandrayaan-3 Is A 'Huge Confidence Booster', Can Help Reverse Brain Drain, CERN Scientist Archana Sharma Says" href="https://ift.tt/BbmXLRQ" target="_self">Chandrayaan-3 Is A 'Huge Confidence Booster', Can Help Reverse Brain Drain, CERN Scientist Archana Sharma Says</a></strong></p> <h3><span style="color: #ff5e00;"><strong>What happens after Aditya-L1 reaches its destination?</strong></span></h3> <p><span style="font-weight: 400;">After Aditya-L1 inserts itself into the halo orbit around L1, and stabilises itself, the spacecraft will start orbiting L1. This is a special point where the gravitational pulls from the Earth and the Sun balance each other out, as a result of which Aditya-L1 will simply hover around L1.</span></p> <p><span style="font-weight: 400;">“Once the spacecraft gets to this Lagrange point, it will not just stop. It is like a slow and graceful dance around that point. But here is the catch – there is no physical object there, like a planet or moon. Instead, the spacecraft moves because of the tugging from the Sun's gravity and Earth's gravity,” <em>said Purohit.</em></span></p> <p><strong>ALSO READ | <a title="Chandrayaan, Apollo, Artemis, Luna – Successful Moon Missions Launched Till Date" href="https://ift.tt/7kXDb65" target="_self">Chandrayaan, Apollo, Artemis, Luna – Successful Moon Missions Launched Till Date</a></strong></p> <p><span style="font-weight: 400;"><em>The former ISRO scientist also said</em> that these orbits have a cool name: halo orbits. “They are special paths that are not perfect circles or ovals. They are more like lopsided shapes called lissajous figures. These orbits are really big – imagine a distance of 13 lakh kilometre-distance between the farthest points. NASA-ESA SOHO mission uses similar orbits.”</span></p> <p><span style="font-weight: 400;">The NASA-ESA Solar & Heliospheric Observatory (SOHO) studies the Sun's internal structure as well as the outer atmosphere, and the dynamics of the solar winds. It was launched in 1995.</span></p> <div class="article-data _thumbBrk uk-text-break"> <p><strong>MUST READ | <a title="Chandrayaan-3: As Vikram Lander And Pragyan Rover Start Operations On Moon, Here Is How They Will Help Humanity" href="https://ift.tt/09Iia7q" target="_self">Chandrayaan-3: How Vikram Lander And Pragyan Rover Will Help Humanity</a></strong></p> </div> <p><span style="font-weight: 400;">When two simple harmonic motions or oscillations that are perpendicular to each other are superimposed, a curve is formed. This is known as a Lissajous figure.</span></p> <p><span style="font-weight: 400;">Aditya-L1, which is equipped with seven payloads, is expected to operate around L1 for five years.</span></p> <p><strong>ALSO READ | <a title="Soft Landing To Trans-Lunar Orbit: Chandrayaan-3 Jargons Explained" href="https://ift.tt/Zog9PVD" target="_self">Soft Landing To Trans-Lunar Orbit: Chandrayaan-3 Jargons Explained</a></strong></p>
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