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History of astronomy - Wikipedia
Astronomy - Ancient, Celestial, Observations | Britannica
Astronomy | Definition, History, Discoveries, & Facts | Britannica
A brief history of astronomy - Canadian Space Agency
Astronomy - Wikipedia
Astronomy: Everything you need to know | Space
A Brief History of Astronomy - Star Walk
History of astronomy and contributions of Ptolemy, Nicolaus …
Encyclopedia of the History of Astronomy and Astrophysics
Education and the History of Astronomy