In space, astronauts cannot cry properly, because there is no gravity, so the tears can't flow down their faces!
175
The Earth gets heavier each day by tons, as meteoric dust settles on it.
118
Only 55% of Americans know that the sun is a star.
986
An international team of astronomers has spotted the farthest known gravitational lens and, as Albert Einstein predicted, it is a galaxy that deflects and intensifies the light of a much further object.
9
A lightning bolt generates temperatures five times hotter than those found at the sun's surface!
127
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
Sound doesn't travel in space.
255
If you were to cry in space, the tears would form a bubble in your eye until it's so big it moves to another spot on your face.
10