Earth is the only planet in our solar system that's not named after a god or goddess.
17
41% of the moon is not visible from earth at any time.
103
An organisation called Mars One is planning to establish a permanent colony of humans on Mars by 2023.
9
More than 20 million meteoroids enter Earth's atmosphere every day.
139
The light hitting the earth right now is 30 thousand years old.
163
In space, astronauts cannot cry properly, because there is no gravity, so the tears can't flow down their faces!
175
Summer on Uranus lasts for 21 years.
358
