Cepheid variables are some of the most well-known variable stars in the sky, responsible for helping astronomers accurately measure cosmic distances and famously clueing Edwin Hubble in to the fact ...
Northwest of the Demon Star in Perseus of the Dec. 6 column is another variable star to watch, Delta Cephei (SEH-fee). This star is the prototype of the Cepheid (seh-FEE-id) Variable stars that Edwin ...
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