Earth is the only planet in our solar system that's not named after a god or goddess.
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Summer on Uranus lasts for 21 years.
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A comet's tail always points away from the sun.
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The Sun and Moon appear to be the same size because the moon is 400 times smaller than the Sun, but 400 times closer to Earth.
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Mars had an oxygen-rich atmosphere around 4 billion years ago
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There is a mysterious and loud radio signal known as 'the space roar' that has yet to be explained.
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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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