* Astronomy

Blobrana · L

RE: Simon Marius (1573 - 1624)

Blobrana · L

In 1612 German astronomer Simon Marius measured the diameter of the Andromeda nebula and discerned it as having a dull, pale light which increased in brightness toward its center, like "a candle shining through horn".
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The first description of the Andromeda Galaxy based on telescopic observation was given by German astronomer Simon Marius in 1612. Charles Messier catalogued it as object M31 in 1764 and incorrectly credited Marius as the discoverer, unaware of Al Sufi's earlier work.
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Spoiler

Blobrana · L

Simon Marius (Latinised from German Simon Mayr) (January 10, 1573 - December 26, 1624) was a German astronomer.
In 1614 Marius published his work Mundus Iovialis describing the planet Jupiter and its moons. Here he claimed to have discovered the planet's four major moons some days before Galileo Galilei. This led to a dispute with Galileo, who showed that Marius provided only one observation as early as Galileo's, and it matched Galileo's diagram for the same date, as published in 1610. It is considered possible that Marius discovered the moons independently, but at least some days later than Galileo.
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