The Earth gets heavier each day by tons, as meteoric dust settles on it.
118
The Space Shuttle main engine weighs 1/7th as much as a train engine but delivers as much horsepower as 39 locomotives.
147
Tidal forces between the Earth and Moon are slowing the Earth down and pushing the Moon further away.
46
An organisation called Mars One is planning to establish a permanent colony of humans on Mars by 2023.
9
The light hitting the earth right now is 30 thousand years old.
163
The volume of the Earth's moon is the same as the volume of the Pacific Ocean.
178
The last time that the Sun was in its current position in space around the Milky Way, dinosaurs ruled the Earth.
10