All of the Earth's continents are wider at the north than in the south - and nobody knows why.
194
Some asteroids have other asteroids orbiting them.
131
On Titan, Saturn's largest moon, the atmosphere is so thick and the gravity so low that humans could fly through it by flapping "wings" attached to their arms.
7
Summer on Uranus lasts for 21 years.
358
The Earth gets heavier each day by tons, as meteoric dust settles on it.
118
Venus is the only planet that rotates clockwise.
310
The Earth weighs around 6,600,000,000,000,000,000,000 tons (5,940 billion billion metric tons)!
221