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.
5
The heart of an astronaut actually gets smaller when in outer space.
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Tidal forces between the Earth and Moon are slowing the Earth down and pushing the Moon further away.
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The Earth gets 100 tons heavier every day due to falling space dust.
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Saturn's rings are about 500,000 miles in circumference but only about a foot thick.
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Scientists have confirmed that Enceladus, one of Saturn’s moons, has a watery ocean.
6
The Space Shuttle main engine weighs 1/7th as much as a train engine but delivers as much horsepower as 39 locomotives.
147
If two pieces of metal touch in space, they become permanently stuck together.
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