Great Comet of 1819 [SEP] discoverer or inventor
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. It was the first comet analyzed using polarimetry, by François Arago.
Discovery.
On July 1, 1819, Johann Georg Tralles in Berlin observed a brilliant comet low in the sky during the evening twilight. It was confirmed the next night by the
iron "committee" meter, a duplicate of the prototype archive meter, was then given as a gift to Ferdinand Rudolph Hassler. From 1803 until 1805 these two men worked together on a topological survey of the Canton of Bern.
In 1819, he discovered the Great Comet of 1819, Comet Tralles, named after him.
He was the inventor of the "alcoholometer", a device for measuring the amount of alcohol in a liquid.
He died in London, England. The crater Tralles on the Moon