In space, astronauts cannot cry properly, because there is no gravity, so the tears can't flow down their faces!
175
Sound doesn't travel in space.
255
Lightning strikes about 6,000 times per minute on this planet!
158
Only 55% of Americans know that the sun is a star.
986
A 100-pound person on Earth would weigh 38 pounds on Mars.
102
Saturn's rings are about 500,000 miles in circumference but only about a foot thick.
160
An organisation called Mars One is planning to establish a permanent colony of humans on Mars by 2023.
9
If two pieces of metal touch in space, they become permanently stuck together.
808