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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 ...
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The Universe’s “Red Sky Paradox” Just Got Darker: Most Stars Might Never Host Observers

A new study from David Kipping attempts to explain why we are located around a yellow star, and so early in the universe.