For more than ten years, the European Space Agencys Rosetta spacecraft careened through space in pursuit of the 4km (2.5 miles) wide comet 67P/Churyumov–Gerasimenko, which is moving at nearly 55,000 kilometres (34,000 miles) per hour. Currently just 100km (62 miles) from the comets surface, Rosetta has been returning close-up images, some of which show a mosaic […]
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