The earth travels through space at 660,000 miles per hour.
189
The heart of an astronaut actually gets smaller when in outer space.
216
There are two golf balls sitting on the moon.
721
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
Jupiter is bigger than all the other planets combined.
254
The population of the Earth has more than doubled since 1950.
151
An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82