There are two golf balls sitting on the moon.
721
Pluto is smaller than Russia.
9
It takes eight and a half minutes for light to get from the sun to earth.
159
There's a mysterious dwarf planet between Mars and Jupiter called 'Ceres' which has never been visited by spacecraft or photographed in detail, however, Earth-bound telescopes reveal a large bright shining spot on the surface of this planet, the origin and nature of which are unknown.
5
The Earth gets 100 tons heavier every day due to falling space dust.
673
There is a mysterious and loud radio signal known as 'the space roar' that has yet to be explained.
15
The Earth weighs around 6,600,000,000,000,000,000,000 tons (5,940 billion billion metric tons)!
221
An organisation called Mars One is planning to establish a permanent colony of humans on Mars by 2023.
9