Any space vehicle must move at a rate of 7 miles per second in order to escape the earth's gravitational pull.
121
More than 20 million meteoroids enter Earth's atmosphere every day.
139
Buzz Aldrin’s mother’s maiden name was Moon.
9
There are approximately 3,500 astronomers in the U.S. - but over 15,000 astrologers.
124
Jupiter's moon Ganymede, is larger than the planet Mercury!
149
41% of the moon is not visible from earth at any time.
103
Venus is the only planet that rotates clockwise.
310
Saturn's rings are about 500,000 miles in circumference but only about a foot thick.
160