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
More than 20 million meteoroids enter Earth's atmosphere every day.
139
An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82
Astronauts get taller when they are in space.
224
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
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
There is a mysterious and loud radio signal known as 'the space roar' that has yet to be explained.
15