Any space vehicle must move at a rate of 7 miles per second in order to escape the earth's gravitational pull.
121
Summer on Uranus lasts for 21 years.
358
It would take more than 150 years to drive a car to the sun.
569
There are two golf balls sitting on the moon.
721
Astronomer Percival Lowell believed that he was the first person to observe canals on Venus, but because of a faulty adjustment of the eyepiece on his telescope, he was in fact looking at the blood vessels in his own eye.
4
The earth travels through space at 660,000 miles per hour.
189
The heart of an astronaut actually gets smaller when in outer space.
216