There is a mysterious and loud radio signal known as 'the space roar' that has yet to be explained.
15
Jupiter is bigger than all the other planets combined.
254
The last time that the Sun was in its current position in space around the Milky Way, dinosaurs ruled the Earth.
10
The Earth weighs around 6,600,000,000,000,000,000,000 tons (5,940 billion billion metric tons)!
221
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
The volume of the Earth's moon is the same as the volume of the Pacific Ocean.
178
Astronomer Percival Lowell believed that he was the first person to observe canals on Venus, but because of a faulty adjustment of the eyepiece on his telescope, he was in fact looking at the blood vessels in his own eye.
4