Any space vehicle must move at a rate of 7 miles per second in order to escape the earth's gravitational pull.
121
A 100-pound person on Earth would weigh 38 pounds on Mars.
102
Pluto is smaller than Russia.
9
There is a mysterious and loud radio signal known as 'the space roar' that has yet to be explained.
15
The Earth gets heavier each day by tons, as meteoric dust settles on it.
118
There are two golf balls sitting on the moon.
721
Jupiter's magnetosphere is the largest single structure inside the Solar System. If you could see it with your eyes, it would appear larger than our full Moon.
8
All of the Earth's continents are wider at the north than in the south - and nobody knows why.
194