Flamsteed, John

(1646-1719) Astronomer. Author of the famous Historia Crelestis Brittanica, drew up the catalog of fixed stars designated by his name, first demonstrated the construction and use of the quadrant, initiated a method of determining the position of the equinox, and made important researches on sun spots whence he drew up a theory of the sun's constitution; he was first astronomer royal of England.

New Catholic Dictionary

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