Astronomy:Hi-tech Challenges — The Moon
Man has been dreaming of going to the moon for centuries. Though we managed to walk on the moon surface thirty years ago， we still haven't so far found out the mystery of how it began. There's no lack of theories. Did the moon exist somewhere else in the solar system get captured by the earth gravitational filed? Is it spinning of the earth out of the spontaneous mission of high energy causing projection of matter into the earth orbit? The mystery remains.
- Added：2006
- Country：America
- Duration：30
- Time of update：2011/8/17 9:54:55