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How the Rubber-Duck Comet Got Its Shape
Scientists are debating two theories about how comet 67P/Churyumov-Gerasimenko was formed.
Credit: Jasiek Krzysztofiak
A year after the Rosetta space mission went into orbit around a comet shaped like a rubber duck, scientists say that they have worked out how the dusty iceball got its shape—although they haven't ironed out every detail.
From Nature
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