Francesco Sizzi
Encyclopedia
Francesco Sizzi, an Italian astronomer
Astronomer
An astronomer is a scientist who studies celestial bodies such as planets, stars and galaxies.Historically, astronomy was more concerned with the classification and description of phenomena in the sky, while astrophysics attempted to explain these phenomena and the differences between them using...

 who lived during the 17th century, is credited with being the first to notice the annual movement of sunspots.

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