The last time that the Sun was in its current position in space around the Milky Way, dinosaurs ruled the Earth.
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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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It would take more than 150 years to drive a car to the sun.
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Scientists have confirmed that Enceladus, one of Saturn’s moons, has a watery ocean.
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A comet's tail always points away from the sun.
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