The heart of an astronaut actually gets smaller when in outer space.
216
There are two golf balls sitting on the moon.
721
In space, astronauts cannot cry properly, because there is no gravity, so the tears can't flow down their faces!
175
The volume of the Earth's moon is the same as the volume of the Pacific Ocean.
178
Approximately 115 tons of ocean salt spray enters the earth's atmosphere each second.
100
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