Astronomy:Hi-tech Challenges — The Universe
The Big Bang， a tremendous explosion in which everything as it said began 15 billion years ago. A fantastic liberation of energy that gave birth to the universe. The universe， a perpetually expanding world and infinite space. Even in today， billions and billions of galaxies are still moving away from each other at dazzling speed. The universe is a fascinating story， mysteries that have captured man's imaginations since the beginning of time. The first question about the universe is of course how it came about 15 billion years ago. And its size， how big is it? And what does it look like?
- Added：2006
- Country：America
- Duration：30
- Time of update：2011/8/25 16:33:57