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
Any space vehicle must move at a rate of 7 miles per second in order to escape the earth's gravitational pull.
121
The heart of an astronaut actually gets smaller when in outer space.
216
Jupiter is bigger than all the other planets combined.
254
One pinhead of the sun's energy is enough to kill a person at a distance of 160 kilometers.
277
There is a mass reservoir of water floating in space that is 100,000 times bigger than our sun and holds 140 trillion times more water than all of our oceans.
11