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A knowledge platform for everything above Earth — astronomy, space, the night sky, celestial events, mythology, and astrology as a clearly separate cultural tradition.

Astronomy is presented as scientific, evidence-based, and sourced. Astrology is presented as cultural, symbolic, and interpretive — never as proven science.

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Home
History of Astronomy
Greek Astronomy

Discover

Greek Astronomy

The Greco-Roman thinkers who made astronomy a geometric science.

5 entries.

Astronomer
Hipparchus
c. 190 BCE – c. 120 BCE
Discovery
Precession of the Equinoxes
c. 130 BCE
Astronomer
Ptolemy
c. 100 CE – c. 170 CE
Publication
Almagest
c. 150 CE
Catalogue
Almagest Star Catalogue
c. 150 CE