Permanent historical records · Updated 2026-11-03

1920 in United States

Explore 1 historical events and records for United States in 1920.

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Historical records for United States in 1920

Sorted by month and day. Records with no month are shown last. Showing 1 of 1 unique records.

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April

26 April 1920

Great Debate Andromeda Argument

Curtis, Heber Doust · Washington DC · Astronomer · Science / Astronomy

Uses spiral nebulae including Andromeda in the Great Debate, arguing that they are external galaxies rather than small objects inside the Milky Way.

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How these records were prepared

Generated from the World History Database historical_events table. Identical display records are collapsed; descriptions otherwise retain the stored text. Coverage and source quality vary. Check primary and specialist sources before citing individual historical claims.