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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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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An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
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In the last 7 years, humanity has discovered 43 potentially habitable planets.
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Pluto is smaller than Russia.
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MDIF, a New York based non-profit organisation, is planning to beam free Wi-Fi to the entire world from space.
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