41% of the moon is not visible from earth at any time.
103
Jupiter's moon Ganymede, is larger than the planet Mercury!
149
An organisation called Mars One is planning to establish a permanent colony of humans on Mars by 2023.
9
Tidal forces between the Earth and Moon are slowing the Earth down and pushing the Moon further away.
46
A lightning bolt generates temperatures five times hotter than those found at the sun's surface!
127
In the last 7 years, humanity has discovered 43 potentially habitable planets.
14
The Space Shuttle main engine weighs 1/7th as much as a train engine but delivers as much horsepower as 39 locomotives.
147
The moon is actually moving away from Earth at a rate of 1.5 inches per year.
236