Cleostratus was a truly pioneering Greek astronomer who lived on the small Aegean island of Tenedos in the 6th century BC.

Around the second century C.E., the Greek astronomer Claudius Ptolemy ... However, there was no rule for what stars were included in a constellation. All star maps used wavy lines to encompass ...

Ancient Egyptian astrology used a zodiac system with 12 signs, much like the one used today. However, instead of aligning with star constellations, their system linked specific days of the month to ...

Its name comes from the Ancient Greek ὀφιοῦχος ... Hemisphere during the winter months. The constellation is home to several notable stars, including Alpha Ophiuchi, also known as ...