Tidal forces between the Earth and Moon are slowing the Earth down and pushing the Moon further away.
46
Any space vehicle must move at a rate of 7 miles per second in order to escape the earth's gravitational pull.
121
Jupiter is bigger than all the other planets combined.
254
There are approximately 3,500 astronomers in the U.S. - but over 15,000 astrologers.
124
The heart of an astronaut actually gets smaller when in outer space.
216
In space, astronauts cannot cry properly, because there is no gravity, so the tears can't flow down their faces!
175
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