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India has begun assembling the spacecraft for Chandrayan-I, its first unmanned mission to the moon scheduled for 2008, a top space agency said on Wednesday.

“We have begun the integration process for the spacecraft structure and are putting in place the antennae required for tracking data from this month,” S Krishnamurthy, director of publicity for the Indian Space Research Organisation, said from Bangalore.

If India’s Moon project planned for September 2007 is successful, it will be something for everyone to cheer loudly about. The Moon is Earth’s single important natural satellite, and as planetary moons go, it is unusually large in size compared to Earth. Our five-stage PSLV rocket is planned to place a scientific satellite around it. In token political gestures, NASA and the Europeans may provide scientific payloads too.
All Indians need to and can come to know what is involved. A trip to the Moon requires a spacecraft reach an “escape” velocity of some 40,000 km per hour. At a distance of some 324,000 km, the spacecraft escapes Earth’s gravity and comes to a “standstill” or “neutral” point, a fictional station on the Earth-Moon axis, still some 32,000 km (or about 19 Moon radii) from the Moon. The Moon’s gravity then gradually takes over, drawing the spacecraft faster and faster towards the Moon, to either land on its surface or go into orbit around it ~ though to avoid a fatal impact crashing into the Moon, the spacecraft may require retrorockets to slow itself down.


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