Johannes Hevelius
![Portrait by [[Daniel Schultz]]](https://upload.wikimedia.org/wikipedia/commons/4/44/Johannes_Hevelius.PNG)
Johannes Hevelius (in German also known as ''Hevel''; ; – 28 January 1687) was a councillor and mayor of Danzig (Gdańsk) , in the Polish–Lithuanian Commonwealth. As an astronomer, he gained a reputation as "the founder of lunar topography", and described ten new constellations, seven of which are still used by astronomers.
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