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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A comet's tail always points away from the sun.
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Mars had an oxygen-rich atmosphere around 4 billion years ago
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In the last 7 years, humanity has discovered 43 potentially habitable planets.
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An organisation called Mars One is planning to establish a permanent colony of humans on Mars by 2023.
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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.
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According to a study by the National Science Foundation, only half of Americans believe in evolution, and one in 4 don't know that the Earth orbits the Sun.
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