A comet's tail always points away from the sun.
2
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
An organisation called Mars One is planning to establish a permanent colony of humans on Mars by 2023.
9
Today's top fuel dragsters take off with more force than the space shuttle.
120
In space, astronauts cannot cry properly, because there is no gravity, so the tears can't flow down their faces!
175
In the last 7 years, humanity has discovered 43 potentially habitable planets.
14
Jupiter's moon Ganymede, is larger than the planet Mercury!
149