Ten Cool Facts About Space - Part 2

5. If two pieces of metal touch in space, they become permanently stuck together because the metal is not surrounded by oxidized matter! This is known as cold welding.

4. Some rocks found on Earth are actually pieces of Mars.

3. There are more stars in the sky than all of the grains of sand on earth.

2. In 1820, the universe was thought to be 6,000 years old. It is now thought to be between 15 and 20 billion years old.

1. The moon is moving away from Earth at a rate of about 3.8 cm each year.

TA-DA! There you have 'em. Fore more awesome space fun, visit the SPACE ADVENTURES exhibit, going on now through August 30.