The Earth weighs around 6,600,000,000,000,000,000,000 tons (5,940 billion billion metric tons)!
221
The density of Saturn is so low that if you were to put it in a giant glass of water it would float.
219
The heart of an astronaut actually gets smaller when in outer space.
216
There are two golf balls sitting on the moon.
721
The sun is 330,330 times larger than the earth!
190
The moon is actually moving away from Earth at a rate of 1.5 inches per year.
236
An organisation called Mars One is planning to establish a permanent colony of humans on Mars by 2023.
9
Pluto is smaller than Russia.
9