Jean Richer
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Jean Richer (1630–1696) was a French astronomer and assistant at the French Academy of Sciences, under the direction of Giovanni Domenico Cassini.
Astronomical and gravimetric observations made on the island of Cayenne by Jean Richer, after an engraving by Sébastien Leclerc.
Giovanni Domenico Cassini
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Giovanni Domenico Cassini, also known as Jean-Dominique Cassini was an Italian mathematician, astronomer and engineer. Cassini was born in Perinaldo, near Imperia, at that time in the County of Nice, part of the Savoyard state. Cassini is known for his work on astronomy and engineering. He discovered four satellites of the planet Saturn and noted the division of the rings of Saturn; the Cassini Division was named after him. Giovanni Domenico Cassini was also the first of his family to begin work on the project of creating a topographic map of France.
The pinhole-projected image of the Sun on the floor at Florence Cathedral. Cassini measured a similar image over a year at San Petronio Basilica to try to prove the Earth orbited the Sun.
Raccolta di varie scritture (1682)