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Today in History: Hubble Reveals Andromeda is Separate Galaxy

11/23/2025

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Summary

Story summary

On November 23, 1920, The New York Times published groundbreaking evidence from astronomer Edwin Hubble, revealing that the Andromeda Nebula is not part of the Milky Way but a separate galaxy. This discovery significantly advanced the understanding of the universe, establishing the field of extragalactic astronomy and reshaping our cosmic perspective.

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Story summary

On November 23, 1920, The New York Times published groundbreaking evidence from astronomer Edwin Hubble, revealing that the Andromeda Nebula is not part of the Milky Way but a separate galaxy. This discovery significantly advanced the understanding of the universe, establishing the field of extragalactic astronomy and reshaping our cosmic perspective.