Orazio Grassi

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Orazio Grassi (Savona, 1583Rome, 1654) was a Italian mathematician, astronomer and architect.

Canonical pertaining to Society of Jesus, he was one of authors in controversy with Galileo Galilei on the nature of the comets.

In 1619, His treatise Libra astronomica et philosophica was published under a pseudonym of Lotario Sarsi Sigenzano (anagram of his name).