The heart of an astronaut actually gets smaller when in outer space.
216
Approximately 115 tons of ocean salt spray enters the earth's atmosphere each second.
100
If you went out into space, you would explode before you suffocated because there's no air pressure.
149
A 100-pound person on Earth would weigh 38 pounds on Mars.
102
41% of the moon is not visible from earth at any time.
103
More than 20 million meteoroids enter Earth's atmosphere every day.
139
There's a mysterious dwarf planet between Mars and Jupiter called 'Ceres' which has never been visited by spacecraft or photographed in detail, however, Earth-bound telescopes reveal a large bright shining spot on the surface of this planet, the origin and nature of which are unknown.
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