... of kilometers deep with mud." (Wieland, 25) Another problem is the shape of our galaxy. "The stars in the Milky Way rotate in a spiral around the center of the galaxy. D. Russell Humphreys said, "`The observed rotation speeds are so fast that if our galaxy were more than a few hundred million years old, it would be a featureless smear of stars instead of ... ...

• Word Count: 1080
• Approx Pages: 4
• Has Bibliography
• Grade Level: High School