Observations Concerning The Planet Venus(facsimile Of Francesco Bianchini 1782)
Bianchini was a renaissance astronomer affiliated with the Vatican. He is known best for his studies of Venus. His deduction of a rotational period of Venus was based on the observation of its surface using a 2.6″ (66mm) 100-foot focal length aerial telescope. Today, we know that this is impossible, because of the thick cloud […]