A 100-pound person on Earth would weigh 38 pounds on Mars.
102
Today's top fuel dragsters take off with more force than the space shuttle.
120
Pluto is smaller than Russia.
9
The heart of an astronaut actually gets smaller when in outer space.
216
Jupiter has radio storms so strong that they can be picked up and heard by an AM radio.
16
A comet's tail always points away from the sun.
2
Tidal forces between the Earth and Moon are slowing the Earth down and pushing the Moon further away.
46