The heart of an astronaut actually gets smaller when in outer space.
216
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
Saturn's moon, Mimas, not only looks like the Death Star, it also has a Pac Man heat signature.
15
Summer on Uranus lasts for 21 years.
358
The last time that the Sun was in its current position in space around the Milky Way, dinosaurs ruled the Earth.
10
Sound doesn't travel in space.
255
41% of the moon is not visible from earth at any time.
103
The typical spec of dust that you see floating in the air is half way in size between the Earth and a subatomic particle.
131