Earth is the only planet in our solar system that's not named after a god or goddess.
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If NASA sent birds into space they would soon die; they need gravity to swallow.
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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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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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An international team of astronomers has spotted the farthest known gravitational lens and, as Albert Einstein predicted, it is a galaxy that deflects and intensifies the light of a much further object.
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Scientists have confirmed that Enceladus, one of Saturn’s moons, has a watery ocean.
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