Some asteroids have other asteroids orbiting them.
131
Saturn's rings are about 500,000 miles in circumference but only about a foot thick.
160
Summer on Uranus lasts for 21 years.
358
All of the Earth's continents are wider at the north than in the south - and nobody knows why.
194
Astronauts get taller when they are in space.
224
There's a mysterious dwarf planet between Mars and Jupiter called 'Ceres' which has never been visited by spacecraft or photographed in detail, however, Earth-bound telescopes reveal a large bright shining spot on the surface of this planet, the origin and nature of which are unknown.
5
The heart of an astronaut actually gets smaller when in outer space.
216
The moon is actually moving away from Earth at a rate of 1.5 inches per year.
236