Defective Circle



A defective circle impacted history in the case of the Transit of Venus. In 1761 and 1769, the transit of Venus across the Sun was observed by astronomers around the world. The purpose of these observations was to measure the distance between the Earth and the Sun. However, the observations were not accurate because of a defective circle in the instruments used to measure the position of Venus. This led to an error in the calculation of the distance between the Earth and the Sun, which had a significant impact on the development of astronomy and navigation.