Summer on Uranus lasts for 21 years.
358
An organisation called Mars One is planning to establish a permanent colony of humans on Mars by 2023.
9
Only 55% of Americans know that the sun is a star.
986
The Earth gets heavier each day by tons, as meteoric dust settles on it.
118
The volume of the Earth's moon is the same as the volume of the Pacific Ocean.
178
Jupiter's moon Ganymede, is larger than the planet Mercury!
149
Some asteroids have other asteroids orbiting them.
131
The density of Saturn is so low that if you were to put it in a giant glass of water it would float.
219