Phases of Venus
Published May 10, 2018

A well-known mathematician Gauss recounted that one day he invited his mother to look into the astronomical pipe on the phases of Venus, brightly shining in the evening sky. The mathematician thought to amaze the mother by surprise, since the pipe phase of Venus is visible in the shape of a sickle. He was surprised, however: he put his eye to the eyepiece, the woman did not express...