The light hitting the earth right now is 30 thousand years old.
163
The earth travels through space at 660,000 miles per hour.
189
Mars had an oxygen-rich atmosphere around 4 billion years ago
13
More than 20 million meteoroids enter Earth's atmosphere every day.
139
The heart of an astronaut actually gets smaller when in outer space.
216
Sound doesn't travel in space.
255
Saturn's moon, Mimas, not only looks like the Death Star, it also has a Pac Man heat signature.
15