In space, astronauts cannot cry properly, because there is no gravity, so the tears can't flow down their faces!
175
If two pieces of metal touch in space, they become permanently stuck together.
808
The Earth gets heavier each day by tons, as meteoric dust settles on it.
118
Venus is the only planet that rotates clockwise.
310
Saturn's rings are about 500,000 miles in circumference but only about a foot thick.
160
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
The Space Shuttle main engine weighs 1/7th as much as a train engine but delivers as much horsepower as 39 locomotives.
147