There is a mysterious and loud radio signal known as 'the space roar' that has yet to be explained.
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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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It 'snows' metal on Venus.
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The density of Saturn is so low that if you were to put it in a giant glass of water it would float.
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Scientists have confirmed that Enceladus, one of Saturn’s moons, has a watery ocean.
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