A 100-pound person on Earth would weigh 38 pounds on Mars.
102
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
One pinhead of the sun's energy is enough to kill a person at a distance of 160 kilometers.
277
Jupiter is bigger than all the other planets combined.
254
The light hitting the earth right now is 30 thousand years old.
163
A comet's tail always points away from the sun.
2
Today's top fuel dragsters take off with more force than the space shuttle.
120