The heart of an astronaut actually gets smaller when in outer space.
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Scientists have confirmed that Enceladus, one of Saturn’s moons, has a watery ocean.
6
A 100-pound person on Earth would weigh 38 pounds on Mars.
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Neil Armstrong, the first man to step foot on the moon, carried with him a piece of cloth and wood from the original 1903 Wright Flyer.
12
An organisation called Mars One is planning to establish a permanent colony of humans on Mars by 2023.
9
Venus is the only planet that rotates clockwise.
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