The Cycle of Water Ice at Comet 67P/Churyumov–GerasimenkoThe Cycle of Water Ice at Comet 67P/Churyumov–Gerasimenko
<p><a href="http://www.esa.int/var/esa/storage/images/esa_multimedia/images/2015/09/the_water-ice_cycle_of_rosetta_s_comet/15614542-3-eng-GB/The_water-ice_cycle_of_Rosetta_s_comet_large.jpg" target="_blank"></a></p> <p>ESA’s Rosetta spacecraft has provided evidence for a daily water-ice cycle on and near the surface of comets.</p> <p>Comets are celestial bodies comprising a mixture of dust and ices,