Any space vehicle must move at a rate of 7 miles per second in order to escape the earth's gravitational pull.
121
If two pieces of metal touch in space, they become permanently stuck together.
808
Pluto is smaller than Russia.
9
The moon is actually moving away from Earth at a rate of 1.5 inches per year.
236
The Sun and Moon appear to be the same size because the moon is 400 times smaller than the Sun, but 400 times closer to Earth.
13
Sound doesn't travel in space.
255
Astronauts cannot burp in space.
232