On the first anniversary of Chandrayaan-3’s historic landing, the Indian Space Research Organisation (ISRO) reflects on the mission that marked a significant milestone in India’s space exploration history. The Chandrayaan-3 mission, which launched on July 14, 2023, and landed on the Moon on August 23, 2023, has been celebrated for its success in achieving a soft landing in a previously unexplored region of the lunar surface.
The final moments of the mission were a culmination of years of meticulous planning, rigorous testing, and unwavering dedication. As the spacecraft neared the Moon, the atmosphere inside ISRO’s Telemetry Tracking and Command Network (ISTRAC) was both tense and calm. Engineers and scientists had to navigate the spacecraft autonomously from a distance of nearly 380,000 kilometers from Earth.
Unlike the Chandrayaan-2 mission in 2019, which ended in failure due to a crash landing, Chandrayaan-3 was equipped with improved technology and design features to ensure success. The final descent phase began at an altitude of 30 kilometers above the lunar surface, with the lander Vikram firing its engines to decelerate from a speed of approximately 6,000 kilometers per hour. A critical challenge during this phase was the transition from a horizontal to a vertical position—a maneuver that had previously contributed to Chandrayaan-2’s failure.
The landing site for Chandrayaan-3 was strategically chosen in the southern polar region of the Moon, a largely unexplored area that promised valuable insights into the Moon’s composition and history. This marked a historic first, as no other nation had previously attempted a landing in this region. Despite Russia’s recent failure with its Luna-25 mission, ISRO’s meticulous preparations ensured that Chandrayaan-3’s landing proceeded smoothly.
The lander Vikram was designed with enhanced features, including strengthened legs to withstand a landing speed of up to 10.8 kilometers per hour and absorb potential impacts. Innovations such as a larger fuel tank for last-minute adjustments, additional solar panels for increased power generation, and a Laser Doppler Velocimeter for precise speed measurement played a crucial role in the successful landing.
As the spacecraft descended, onboard navigation software and hazard cameras carefully selected a landing site and oriented the spacecraft for touchdown. The culmination of these efforts was marked by ISRO Chief’s triumphant announcement, “India is on the Moon. Chandrayaan-3 has landed.”
The successful landing sparked nationwide celebrations and was hailed as a testament to India’s growing prowess in space exploration. Prime Minister Narendra Modi praised the achievement as a contribution to global scientific knowledge and future lunar missions.
The landing phase marked the beginning of the scientific mission, with the Pragyan rover deployed to study the lunar surface’s seismicity, thermal properties, and search for water-based ice. The data gathered by Pragyan, along with the lander’s five scientific instruments, is expected to provide new insights into the Moon’s formation and evolution, as well as its potential for future human exploration.
Chandrayaan-3’s success underscores the global surge in lunar exploration, with countries like Russia, the United States, and China actively pursuing their own missions. India’s achievement reflects the power of perseverance, innovation, and international scientific collaboration in expanding the boundaries of human knowledge and exploration.
As ISRO prepares for its next mission, Chandrayaan-4, Vikram and Pragyan remain in sleep mode at Shiv Shakti Point, awaiting the next chapter in India’s ambitious lunar exploration journey.
