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Did Cepheid Variables Help Discover the Expansion of the Universe?
š” The Answer
- Edwin Hubble used Cepheid distances to show galaxies recede faster the farther they are.
- His 1929 paper relied on Cepheid calibrations by Henrietta Leavitt and others.
- This discovery led directly to the Big Bang theory and modern cosmology.
- Cepheids remain essential for measuring the universe's expansion rate today.
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On This Day ā October 313 events ā
1923 ā The first of 160 consecutive days of 100Ā° Fahrenheit at Marble Bar, Western Aust
1924 ā World Savings Day is announced in Milan, Italy by the Members of the Association
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