Earth is the only planet in our solar system that's not named after a god or goddess.
17
In the last 7 years, humanity has discovered 43 potentially habitable planets.
14
An organisation called Mars One is planning to establish a permanent colony of humans on Mars by 2023.
9
It takes a photon 170,000 years to travel from the core of the Sun to the surface, but only 8 minutes to travel the rest of the way to Earth.
6
Tidal forces between the Earth and Moon are slowing the Earth down and pushing the Moon further away.
46
Summer on Uranus lasts for 21 years.
358
Sound doesn't travel in space.
255
The Sun and Moon appear to be the same size because the moon is 400 times smaller than the Sun, but 400 times closer to Earth.
13