Guido d'Arezzo (crater)
|Eponym||Guido of Arezzo|
Guido d'Arezzo is a crater on Mercury. It has a diameter of 66 kilometers. Its name was adopted by the International Astronomical Union in 1976. Guido d'Arezzo is named for the Italian music theorist Guido of Arezzo, who lived from 990 to 1050.
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