If two pieces of metal touch in space, they become permanently stuck together.
808
Neil Armstrong, the first man to step foot on the moon, carried with him a piece of cloth and wood from the original 1903 Wright Flyer.
12
A comet's tail always points away from the sun.
2
The heart of an astronaut actually gets smaller when in outer space.
216
Astronomer Percival Lowell believed that he was the first person to observe canals on Venus, but because of a faulty adjustment of the eyepiece on his telescope, he was in fact looking at the blood vessels in his own eye.
4
Astronauts get taller when they are in space.
224
A 100-pound person on Earth would weigh 38 pounds on Mars.
102