There are 5 to 10 times more stars in the known Universe than there are grains of sand on all the world's beaches, but a single grain of sand has more atoms than there are stars in the known Universe.
20
A comet's tail always points away from the sun.
2
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
Jupiter has radio storms so strong that they can be picked up and heard by an AM radio.
16
Saturn's moon, Mimas, not only looks like the Death Star, it also has a Pac Man heat signature.
15
Mars had an oxygen-rich atmosphere around 4 billion years ago
13
Sound doesn't travel in space.
255