Francesco Bianchini Venus Map, 1728
Venus Map appeared in "Hesperi et Phosphori nova phaenomena sive observationes circa planetam Veneris", 1728. Francesco Bianchini (December 13, 1662 - March 2, 1729) was an Italian philosopher and scientist. He was secretary of the commission for the reform of the calendar, working on the method to calculate the astronomically correct date for Easter in a given year. His deduction of the rotational period of Venus was based on the observation of its surface using a 66mm 100 foot focal length aerial telescope. He also worked on the parallax of Venus, and he measured the precession of the Earth's rotational axis. His point of view on the Copernican system is not evident, but it was noted that the picture of the planetary system in his book about Venus has an empty center. He died in 1729 at the age of 66.
Size: 2700px × 4737px
Photo credit: © Photo Researchers / Alamy / Afripics
License: Licensed
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