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Loading contentThe Encyclopedia is Asteria Star's reference layer. It defines the vocabulary, traces how humanity's understanding of the sky developed, and gives cultural and historical context. Scientific history and physics are presented factually; the history of astrology and mythology are presented as cultural heritage.
Plain-language definitions of astronomy and astrology terms.
How humans learned to read and measure the sky.
The cultural history of a centuries-old tradition.
How early cultures observed and used the sky.
The Greek myths behind constellation and planet names.
The Roman names that the planets still carry.
Sky deities and star lore of ancient Egypt.
Early systematic record-keeping of the heavens.
The people who changed how we see the cosmos.
The story of how humanity reached into space.
The physical ideas that make sense of the universe.
A chronological thread through astronomy's milestones.
The universe, studied with evidence.
What to see in the sky, and when.
A cultural and symbolic tradition — clearly labeled as such.
Tools for the sky — astronomical and traditional.
See the universe — through verified, openly licensed imagery.
Learn the sky, step by step.