An organisation called Mars One is planning to establish a permanent colony of humans on Mars by 2023.
9
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
In space, astronauts cannot cry properly, because there is no gravity, so the tears can't flow down their faces!
175
Summer on Uranus lasts for 21 years.
358
The typical spec of dust that you see floating in the air is half way in size between the Earth and a subatomic particle.
131
The Earth gets heavier each day by tons, as meteoric dust settles on it.
118
Some asteroids have other asteroids orbiting them.
131
The moon is actually moving away from Earth at a rate of 1.5 inches per year.
236