On August 23, 2023, India’s Chandrayaan-3 landed near the south pole of the Moon. Now ISRO chief has declared this day as National Space Day by releasing a video on Twitter. ISRO chief Dr. S. Somnath has appealed to people across the country to participate in this celebration.
ISRO Chief said that on this day, events will be organized by ISRO across the country. But before this celebration, let us know how our ISRO scientists had successfully landed Chandrayaan-3…
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Read the full story of the dangerous landing
ISRO started live streaming of the landing of Chandrayaan-3 at 5:20 pm on 23 August 2023. On YouTube, Facebook and ISRO site. Millions and crores of people were watching him. When ISRO scientists informed that now the landing is about to start. People were eagerly not taking their eyes off ISRO’s streaming.
People were trying to understand by looking at charts and graphs which only scientists understand. We explain to you with a simple chart what was the special thing about this landing.
Chandrayaan-3 was 30 kilometers in height from the landing site and 745.6 kilometers away from the surface. Landing starts from here. The landing was divided into four parts.
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Rough breaking phase: 30 Chandrayaan-3’s lander was to reach a distance of 7.4 kilometers from a height of 1 kilometer. It took him 690 seconds. That means 11.5 minutes. During this period, Chandrayaan traveled 713 kilometers. He started the journey by reducing his speed from 1.68 kilometers per second to 358 meters per second. This speed was to come down. Horizontal speed was .61 meters per second.
Altitude Hold Phase: That means the distance covered was 32 to 28.52 kilometers. The height was 6.8 kilometers. It took only 10 seconds. The speed of descent was 336 meters per second. Horizontal speed was .59 meters per second.
Fine breaking phase: Distance covered from 28.52 kilometers to 0 kilometers. That means the lander was now just above the landing site. The altitude was 0.8 to 1.3 kilometers. Because he had to come down after seeing the right place to land. That means he was flying like a helicopter. All four of his legs were downwards. In this position he reached a height of 150 meters at a speed of 2 meters per second. It took 175 seconds to complete this entire process i.e. about three minutes.
Terminal Descent Phase: It starts from a height of 150 meters straight down towards the surface. During this time, the lander of Chandrayaan-3 was descending horizontally at a speed of 0.5 meters per second and vertically at a speed of 2 meters per second.
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It took 73 seconds to go from 150 meters to 60 meters. Of which 52 seconds were retargeting. That is, they started searching for a safe place. After this he covered the distance from 60 meters to 10 meters in 38 seconds. In the last 9 seconds he covered a distance of 10 meters to the surface.
After so much mathematics and accuracy, Vikram Lander placed his feet on the lunar soil. Only then did this mission succeed. Not only this, around three minutes after landing, when the moon dust raised due to landing settled on the ground, then Pragyan Rover came out.