Jupiter's moon Ganymede, is larger than the planet Mercury!
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Some asteroids have other asteroids orbiting them.
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If you went out into space, you would explode before you suffocated because there's no air pressure.
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All of the Earth's continents are wider at the north than in the south - and nobody knows why.
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Astronauts get taller when they are in space.
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The ashes of the man who discovered Pluto are currently en route to dwarf planet, scheduled to arrive on the 14th of July, 2015.
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More than 20 million meteoroids enter Earth's atmosphere every day.
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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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