26 April 1920
Great Debate Andromeda Argument
Uses spiral nebulae including Andromeda in the Great Debate, arguing that they are external galaxies rather than small objects inside the Milky Way.
Historical place archive
Browse historical events and people recorded at Washington DC in United States. The records below are rendered directly from the World History Database into this page's initial HTML.
Uses spiral nebulae including Andromeda in the Great Debate, arguing that they are external galaxies rather than small objects inside the Milky Way.
Provenance
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