It 'snows' metal on Venus.
13
All of the Earth's continents are wider at the north than in the south - and nobody knows why.
194
One pinhead of the sun's energy is enough to kill a person at a distance of 160 kilometers.
277
The Earth gets heavier each day by tons, as meteoric dust settles on it.
118
Sound doesn't travel in space.
255
In space, astronauts cannot cry properly, because there is no gravity, so the tears can't flow down their faces!
175
The Space Shuttle main engine weighs 1/7th as much as a train engine but delivers as much horsepower as 39 locomotives.
147
Some asteroids have other asteroids orbiting them.
131