The temperature of the earth's interior increases by 1 degree every 60 feet down.
115
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
A neutron star (what remains after a Super Nova) is so dense that a portion of it the size of a sugar cube would weigh as much as all of humanity, or more than all the cars in the United States.
5
The typical spec of dust that you see floating in the air is half way in size between the Earth and a subatomic particle.
131
A lightning bolt generates temperatures five times hotter than those found at the sun's surface!
127
The last time that the Sun was in its current position in space around the Milky Way, dinosaurs ruled the Earth.
10
A comet's tail always points away from the sun.
2