Question

chandrayaan 1 par article in english

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Answer 1

Answer:

Chandrayaan-1 was the first Indian lunar probe under the Chandrayaan program. It was launched by the Indian Space Research Organisation ( ISRO ) in October 2008, and operated until August 2009. The mission included a lunar orbiter and an impactor. The attempt was a failure; it turned out the Chandrayaan-1 radar was not pointed at the Moon during the experiment.India's first lunar probe - the Chandrayaan-1 spacecraft - which was considered lost, is still orbiting the Moon, Nasa scientists have found by using a new ground-based radar technique.Earlier reports had emerged about a collaboration with Japan on a mission to the lunar south pole where India would be providing the lander while Japan would provide both launcher and rover.

Answer 2

On 14 November 2008, the Moon Impact Probe separated from the Chandrayaan orbiter at 14:36 UTC and struck the south pole in a controlled manner, making India the fourth country to place its flag insignia on the Moon.[11] The probe hit near the crater Shackleton at 15:01 UTC, ejecting sub-surface soil that could be analysed for the presence of lunar water ice.[12] The location of impact was named Jawahar Point.[13]

The estimated cost for the project was ₹386 crore (US$51 million).[14]

It was intended to survey the lunar surface over a two-year period, to produce a complete map of the chemical composition at the surface and three-dimensional topography. The polar regions are of special interest as they might contain water ice.[15] Among its many achievements was the discovery of widespread presence of water molecules in lunar soil.[16]

After almost a year, the orbiter started suffering from several technical issues including failure of the star tracker and poor thermal shielding; Chandrayaan-1 stopped communicating at about 20:00 UTC on 28 August 2009, shortly after which the ISRO officially declared that the mission was over. Chandrayaan-1 operated for 312 days as opposed to the intended two years, but the mission achieved most of its scientific objectives.[5][17][18][19]

On 2 July 2016, NASA used ground-based radar systems to relocate Chandrayaan-1 in its lunar orbit, more than seven years after it shut down.[20][21] Repeated observations over the next three months allowed a precise determination of its orbit which varies between 150 and 270 km (93 and 168 mi) in altitude every two years.