Summer on Uranus lasts for 21 years.
358
The Earth gets heavier each day by tons, as meteoric dust settles on it.
118
Earth is the only planet in our solar system that's not named after a god or goddess.
17
An organisation called Mars One is planning to establish a permanent colony of humans on Mars by 2023.
9
41% of the moon is not visible from earth at any time.
103
The Earth gets 100 tons heavier every day due to falling space dust.
673
Astronomer Percival Lowell believed that he was the first person to observe canals on Venus, but because of a faulty adjustment of the eyepiece on his telescope, he was in fact looking at the blood vessels in his own eye.
4