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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Astronomer Percival Lowell believed that he was the first person to observe canals on Venus, but because of a faulty adjustment of the eyepiece on his telescope, he was in fact looking at the blood vessels in his own eye.
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Jupiter is bigger than all the other planets combined.
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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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An organisation called Mars One is planning to establish a permanent colony of humans on Mars by 2023.
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Tidal forces between the Earth and Moon are slowing the Earth down and pushing the Moon further away.
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