Some asteroids have other asteroids orbiting them.
131
In space, astronauts cannot cry properly, because there is no gravity, so the tears can't flow down their faces!
175
Summer on Uranus lasts for 21 years.
358
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
Jupiter is bigger than all the other planets combined.
254
Approximately 115 tons of ocean salt spray enters the earth's atmosphere each second.
100
The earth rotates more slowly on its axis in March than in September.
145
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