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View Full Version : What are Cepheid Variables?



Fraser
2016-Oct-05, 06:30 PM
Discovered in the late 18th century, Cepheid Variable stars have become an important tool for measuring the size of the Universe.
The post What are Cepheid Variables? (http://www.universetoday.com/40468/cepheid-variables/) appeared first on Universe Today (http://www.universetoday.com).


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