The temperature of the earth's interior increases by 1 degree every 60 feet down.
115
41% of the moon is not visible from earth at any time.
103
The volume of the Earth's moon is the same as the volume of the Pacific Ocean.
178
It takes eight and a half minutes for light to get from the sun to earth.
159
Neil Armstrong, the first man to step foot on the moon, carried with him a piece of cloth and wood from the original 1903 Wright Flyer.
12
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
All of the Earth's continents are wider at the north than in the south - and nobody knows why.
194
Jupiter's moon Ganymede, is larger than the planet Mercury!
149