Mars had an oxygen-rich atmosphere around 4 billion years ago
13
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
Astronauts get taller when they are in space.
224
In space, astronauts cannot cry properly, because there is no gravity, so the tears can't flow down their faces!
175
Today's top fuel dragsters take off with more force than the space shuttle.
120
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
The earth rotates more slowly on its axis in March than in September.
145
Jupiter is bigger than all the other planets combined.
254