Any space vehicle must move at a rate of 7 miles per second in order to escape the earth's gravitational pull.
121
There is a mysterious and loud radio signal known as 'the space roar' that has yet to be explained.
15
A 100-pound person on Earth would weigh 38 pounds on Mars.
102
Astronauts get taller when they are in space.
224
There are 5 to 10 times more stars in the known Universe than there are grains of sand on all the world's beaches, but a single grain of sand has more atoms than there are stars in the known Universe.
20
Pluto is smaller than Russia.
9
The earth travels through space at 660,000 miles per hour.
189
The density of Saturn is so low that if you were to put it in a giant glass of water it would float.
219