Sound doesn't travel in space.
255
The heart of an astronaut actually gets smaller when in outer space.
216
Summer on Uranus lasts for 21 years.
358
In space, astronauts cannot cry properly, because there is no gravity, so the tears can't flow down their faces!
175
Neil Armstrong, the first man to step foot on the moon, carried with him a piece of cloth and wood from the original 1903 Wright Flyer.
12
The sun is 330,330 times larger than the earth!
190
All of the Earth's continents are wider at the north than in the south - and nobody knows why.
194
The Sun and Moon appear to be the same size because the moon is 400 times smaller than the Sun, but 400 times closer to Earth.
13