13 May 2015 in News: Delta Cephei's secret companion and intriguing past - Astronomy Now Online

Astronomy Now Online13 May 2015 in News: Delta Cephei's secret companion and intriguing pastAstronomy Now OnlineDelta Cephei, prototype of Cepheids, which has given its name to all similar variable stars, was discovered 230 years ago by the English astronomer, John Goodricke. Since the early 20th century, scientists have been interested in measuring cosmic ...

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