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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In the last 7 years, humanity has discovered 43 potentially habitable planets.
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The density of Saturn is so low that if you were to put it in a giant glass of water it would float.
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The Space Shuttle main engine weighs 1/7th as much as a train engine but delivers as much horsepower as 39 locomotives.
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Pluto is smaller than Russia.
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Saturn's moon, Mimas, not only looks like the Death Star, it also has a Pac Man heat signature.
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On Titan, Saturn's largest moon, the atmosphere is so thick and the gravity so low that humans could fly through it by flapping "wings" attached to their arms.
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Earth is the only planet in our solar system that's not named after a god or goddess.
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