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2025-10-05 12:00:05
WWW.LIVESCIENCE.COM
Science history: Edwin Hubble uncovers the vastness of the universe with discovery of 'standard candle' Oct. 5, 1923
On the night of Oct. 5, 1923, Edwin Hubble observed a strange star that flickered in intensity at regular intervals. The star, dubbed M31-V1, was key to showing that the universe extended far beyond the borders of the Milky Way.
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