What is the name of the person who discovered XXX?
Great Comet of 1819
The Great Comet of 1819, officially designated as C/1819 N1, also known as Comet Tralles, was an easily visible brilliant comet, approaching an apparent magnitude of 1--2, discovered July 1, 1819 by Johann Georg Tralles in Berlin, Germany.
Johann Georg Tralles