If you’ve ever seen a documentary about the Moon, you’ll have seen someone enthusiastically hurling a stone into a tray full of flour to demonstrate how impact craters are formed. Of all the hundreds of thousands of craters on the Moon, one looks exactly like the feature these dramatic demonstrations produce – a deep, sharp-edged pit surrounded by rays of debris. Copernicus looks exactly like a lunar crater should: a great hole in the Moon with a dark, shadowed floor; a high, sky scratching rim and lots of bright rays of dust and pulverised rock splashing away from it. Its nickname, the Monarch of the Moon, is entirely justified – no other crater comes close to it for sheer ‘wow’ factor when seen through a telescope eyepiece. That’s why lunar observers go back to it again and again and again, staring down into it every chance they get.
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