Any space vehicle must move at a rate of 7 miles per second in order to escape the earth's gravitational pull.
121
Pluto is smaller than Russia.
9
All of the Earth's continents are wider at the north than in the south - and nobody knows why.
194
It 'snows' metal on Venus.
13
41% of the moon is not visible from earth at any time.
103
It takes eight and a half minutes for light to get from the sun to earth.
159
Sound doesn't travel in space.
255