Ernst Hartwig

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Carl Ernst Albrecht Hartwig (January 14, 1851 – May 3, 1923) was a German astronomer.

He discovered a new star in M31 (the "Andromeda Nebula") on August 20, 1885. This object was designated as supernova "S Andromedae". During the 1883 observation campaign of comet 6P/d'Arrest he found five NGC objects working at the Strasbourg Observatory.

Craters on the Moon and on Mars were named in his honor.

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