Some asteroids have other asteroids orbiting them.
131
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
Summer on Uranus lasts for 21 years.
358
The Earth gets 100 tons heavier every day due to falling space dust.
673
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
Jupiter has radio storms so strong that they can be picked up and heard by an AM radio.
16
41% of the moon is not visible from earth at any time.
103
A comet's tail always points away from the sun.
2