Jupiter joins Mercury in early twilight as Mars lingers with Leo after dark. Saturn is visible in the morning, meeting ...

Learn about the myths surrounding the constellations first mapped by the Ancient Greek philosopher Hipparchus. This event takes place on the summer solstice ...

Astronomer Hipparchus of Rhodes (c.190 BC – c.120 BC) is well known for his study of this motion in the second century BC, and it is possible that the device was constructed by a student of ...