28 January

Hevelius was a German astronomer, who established his own observatory on the rooftops of several houses in Leiden, the Netherlands.

From four years' telescopic study of the Moon, using telescopes of long focal power, Hevelius compiled an atlas of the Moon with some of the earliest detailed maps. A few of his names for lunar mountains (e.g., the Alps) are still in use, and a lunar crater is named for him.