[–] anigbrowl 11y ago ↗ Needs some information (even if speculative) about temperature and energy sources. The Daily Mail (of all places) has a more informative introdution: http://www.dailymail.co.uk/sciencetech/article-2848739/Europ...Wikipedia's article is very good, as is typical of astronomy content there.
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[ 2.3 ms ] story [ 14.3 ms ] threadWikipedia's article is very good, as is typical of astronomy content there.