The Cosmos: Create a Spiral Galaxy
A galaxy is a massive collection of stars, stellar remains, gas, dust, and planets. Galaxies can contain as few as 10 million stars, or as many as 100 trillion. Astronomers believe that there are about 170 billion galaxies in our universe, each varying in shape from spiral, elliptical, to irregular....
Posted by huynguyen on 06 8th, 2013 |
No Comments

Loading ...