It takes a photon 170,000 years to travel from the core of the Sun to the surface, but only 8 minutes to travel the rest of the way to Earth.
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It would take more than 150 years to drive a car to 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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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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It 'snows' metal on Venus.
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Mars had an oxygen-rich atmosphere around 4 billion years ago
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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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