Sound doesn't travel in space.
255
The Earth gets 100 tons heavier every day due to falling space dust.
673
There are two golf balls sitting on the moon.
721
Astronauts cannot burp in space.
232
Jupiter's moon Ganymede, is larger than the planet Mercury!
149
It takes eight and a half minutes for light to get from the sun to earth.
159
In space, astronauts cannot cry properly, because there is no gravity, so the tears can't flow down their faces!
175
Any space vehicle must move at a rate of 7 miles per second in order to escape the earth's gravitational pull.
121