Saturn's moon, Mimas, not only looks like the Death Star, it also has a Pac Man heat signature.
15
There is a mysterious and loud radio signal known as 'the space roar' that has yet to be explained.
15
It 'snows' metal on Venus.
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
An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82