Extragalactic Nature of Spiral Nebulae
Hubble's results on Cepheid variables in spiral nebulae are formally presented at a joint meeting of the American Astronomical Society and the American Association for the Advancement of Science.
Permanent historical records · Updated 2026-11-03
1925 in United States of America
Explore 37 historical events and records for United States of America in 1925.
Historical records for United States of America in 1925
Sorted by month and day. Records with no month are shown last. Showing 37 of 37 unique records.
37Unique records
1 of 1Page
37Named events on this page
23Named people on this page
17Places on this page
January
Governor
Appointed Governor of Wyoming, 1st female Governor in the USA
Birth of John De Lorean
Birth of John De Lorean
Birth of Paul Leonard Newman
Birth of Paul Leonard Newman
Birth of Douglas Engelbart
Birth of Douglas Engelbart
Andromeda Extragalactic Result Presented
Presents the Andromeda Cepheid evidence to the astronomical community, establishing M31 as a separate galaxy and greatly enlarging the known scale of the universe.
February
Birth of John Uhler Jack Lemmon
Birth of John Uhler "Jack" Lemmon
March
Inaugural Address
Uses his vice-presidential inaugural speech to attack Senate procedural obstruction.
Senate Presidency
Begins presiding over the United States Senate as Vice President.
Vice President
Sworn in as Vice President of the United States under Calvin Coolidge.
April
Buenos Aires Relativity Lectures
Lectures in Buenos Aires on relativity and modern theoretical physics, bringing his account of spacetime and gravitation to large South American audiences.
Montevideo Relativity Lectures
Visits Montevideo and discusses relativity with university and public audiences, extending the international circulation of his gravitational and spacetime ideas.
May
Birth of Malcolm X
Birth of Malcolm X, Malcolm Little
Rio de Janeiro Relativity Lectures
Speaks in Rio de Janeiro during his South American tour, explaining relativity while participating in debates about theoretical science and its wider significance.
June
Marriage
Howard Hughes marries Ella Rice
United States Signs Geneva Protocol
The United States signs the Geneva Protocol prohibiting use in war of chemical and bacteriological methods of warfare.
September
Birth of BB King
Birth of BB King
November
Copley Medal
Awarded the Royal Society's Copley Medal for relativity and contributions to quantum theory.
December
Trial
Found guilty of conduct prejudicial to the good of the armed services
Other events (month unknown)
An American Tragedy
Publication of "An American Tragedy"
Arrowsmith
Publication of "Arrowsmith"
Birth of Robert Francis Kennedy
Birth of Robert Francis Kennedy
Grand Ole Opry
Grand Ole Opry, Nashville, Tennessee, begins Saturday night radio broadcasts featuring regional music, helps fuse Southeastern and Western styles, creating country and western genre
Hebrew University Administrative Council
Joins the administrative council of the Hebrew University of Jerusalem.
In Our Time
Publication of "In Our Time"
Major General
Appointed Major General
NGC 6822 as a Remote Stellar System
Hubble publishes his major study of NGC 6822, resolving stellar populations and using variable stars to demonstrate that the object is a remote stellar system beyond the Milky Way.
Nobel Peace Prize
Shares the 1925 Nobel Peace Prize for his work on German reparations.
Nobel Prize
Shares the 1925 Nobel Peace Prize for his work on the Dawes Plan.
Quantum Mechanics Critique Begins
Engages critically with the emerging matrix and wave formulations of quantum mechanics.
Second Quantum Gas Paper
Publishes further work on the quantum theory of the ideal monatomic gas.
Senate Rules
Campaigns for Senate rules changes to curb filibusters and procedural delay.
South America Lecture Tour
Tours Argentina, Uruguay and Brazil, giving lectures and meeting scientific and civic audiences.
Studies with Martin Heidegger
Arendt studied with Martin Heidegger and became interested in existential philosophy.
The Great Gatsby
Publication of "The Great Gatsby"
The Professors House
Cather published The Professor's House, a novel exploring disillusionment and memory.
Unified Gravitation and Electromagnetism Paper
Publishes a unified field theory of gravitation and electricity, beginning a long programme to extend relativity into a single classical field framework.
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.