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
Venus is the only planet that rotates clockwise.
310
A comet's tail always points away from the sun.
2
In space, astronauts cannot cry properly, because there is no gravity, so the tears can't flow down their faces!
175
The last time that the Sun was in its current position in space around the Milky Way, dinosaurs ruled the Earth.
10
The density of Saturn is so low that if you were to put it in a giant glass of water it would float.
219
In the last 7 years, humanity has discovered 43 potentially habitable planets.
14
A 100-pound person on Earth would weigh 38 pounds on Mars.
102