Many people have sacrificed their lives to quench the thirst for knowledge and to satisfy his curiosity to gain knowledge. In the Olden days people used to worship sun and moon thinking them sacred heavenly bodies. But the scientific investigation had proved that sun is an ordinary star and moon is a planet like other planets. After this the man has entered the age of the space travel.
The invention of-rocket was the first step in space travel. Scientists had already discovered that there was neither air nor water on the moon. The moon was the first target of the man. The moon is our nearest neighbor. It is about 300000 kms from the earth. A space ship travelling at a speed of 4000 kms/hour can cover this distance in 10 hours. The scientists had further discovered that the surface of moon is rough and full of craters, rocks and mountains.
