Cepheus vs Cygnus
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Cepheus
Cepheus is a northern constellation named for the king Cepheus in Greek mythology and included by the Greek astronomer Ptolemy in his second-century catalogue. It remains one of the 88 modern constellations recognized by the International Astronomical Union. A notable star in the constellation is Delta Cephei, the prototype of Cepheid variable stars, whose regular changes in brightness help astron...
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Cygnus
Stretching along the Milky Way in the northern sky, Cygnus represents a swan in the classical constellation tradition. Its main stars also form the recognizable Northern Cross pattern. Deneb, marking the swan's tail, is one of the three stars of the Summer Triangle, a larger pattern that spans several constellations. Greek astronomers knew Cygnus, and Ptolemy included it in his catalog in the seco...
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