Venus. Michael Scot, Liber de signis et ymaginibus celi. Wellcome Library MS 509 (ca.1450-60, North Italy), f.23v
Venus completes its circuit in one year. The thickness of its sphere is 3,313,545 miles and its diameter is 2,884 miles. This planet follows the Sun. It is called Lucifer when it precedes the Sun (as the morning star) and Vesper when it follows the Sun (as the evening star).