It takes eight and a half minutes for light to get from the sun to earth.
159
Any space vehicle must move at a rate of 7 miles per second in order to escape the earth's gravitational pull.
121
The population of the Earth has more than doubled since 1950.
151
Astronauts cannot burp in space.
232
Venus is the only planet that rotates clockwise.
310
41% of the moon is not visible from earth at any time.
103
The earth is .02 degrees hotter during a full moon.
157
More than 20 million meteoroids enter Earth's atmosphere every day.
139