Astronomy Unlocked: Nov. 20, 2025
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Author:
Michael E. Bakich
Today in the History of Astronomy
Nov. 9, 1939: The birth of Carl Sagan
Today in the History of Astronomy
Nov. 8, 1656: The birth of Edmond Halley
Today in the History of Astronomy
Oct. 22, 2137 B.C.E.: An eclipse darkens skies over ancient China
Today in the History of Astronomy
Oct. 2, 480 B.C.E.: A eclipse causes a retreat
Today in the History of Astronomy
Sept. 18, 1965: Discovery of Comet Ikeya-Seki
Science
,
Solar System
Mars’ underground preserves its ancient past
Today in the History of Astronomy
Aug. 18, 1868: Helium is discovered
Today in the History of Astronomy
Aug. 2, 1133: A total eclipse is misremembered
Observing
Explore the wonders of the constellation Andromeda
Today in the History of Astronomy
July 28, 1851: The first photo of a total eclipse
Today in the History of Astronomy
July 19, 418: A solar eclipse/comet combo
Observing
What is there to observe in Serpens?
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