article for Chandrayaan
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Beginning in 2004, Annadurai was program director for India’s lunar probes Chandrayaan-1 and Chandrayaan-2. Chandrayaan-1 was launched from Sriharikota Island, India, on October 22, 2008, by a PSLV-C11 launch vehicle. It had a mass at liftoff of 1,380 kg (3,042 pounds), including a 55-kg (121-pound) payload that contained 11 scientific instruments from India and several other countries. The estimated life of the mission was two years. The craft entered lunar orbit on November 8, and on November 14 the Moon Impact Probe, which contained three instruments, was released; it hit near the lunar South Pole. Contact with the probe was abruptly lost on August 28, 2009, and three days later ISRO officially declared the project terminated.
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Chandrayaan 2 was launched on July 22 from the same launch pad from which Chandrayaan 1 had taken off. Instead of using the outdated PSLV rocket used earlier, the spacecraft made use of the advanced Geosynchronous Satellite Launch Vehicle Mark III (GSLV Mk III).
The spacecraft is expected to land on the Moon's on September 7, 2019. According to NASA, the Moon's polar craters have the Solar System's lowest temperature. It will be the first probe in the world which will land on the lunar south pole. The main mission objective is the exploration of lunar water near the polar region.
Also, ISRO plans to test the capabilities of its lunar rover named Pragyan. Weighing 27kg, the rover operates on solar power and travels at a speed of 1cm per second. It will continuously perform chemical analysis of the soil and send back to the lander (named Vikram), which will update the ground station.
It is expected that the rover will operate for 14 days but the duration may vary since Pragyan uses solar power to keep itself up.
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