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·23 min·2 clips

India's Chandrayaan-2 aimed for the lunar south pole, where sunlight never reaches some crater floors, forcing risky design compromises.

The episode begins by recounting India's Chandrayaan-2 mission, which aimed to land near the lunar south pole to search for water ice but failed during descent. It explains the design compromises, like side-mounted solar panels, due to low sunlight angles and limited rocket power. Chandrayaan-3 is introduced as a near-identical but improved version, with one less engine and more fuel for a longer, controlled descent. The host delves into the physics of lunar landing, highlighting India's struggle with engine throttling. The launch on July 14, 2023, placed Chandrayaan-3 into a lower-than-planned orbit, risking re-entry, but extra fuel allowed recovery through five orbit-raising maneuvers. By August, it entered lunar orbit, and on August 23, the Vikram lander successfully touched down after a suspenseful descent, making India the fourth country to achieve a soft lunar landing. The Pragyan rover deployed but both died during the lunar night. The episode then shifts to India's future plans, including a 2027 sample return mission, contrasting it with China's tested skip-reentry technique. It critiques India's choice to land Chandrayaan-4 near the previous site as scientifically wasteful. The host also covers India's other space ambitions, like the Mangalyaan Mars orbiter and a Venus probe, noting their low cost but reliance on foreign help and inconsistent success. The episode ends by hinting at issues with U.S. deep-space network support due to government shutdowns.

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