description Cepheus Overview
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 astronomers estimate distances. Cepheus is associated with both classical mythology and stellar-distance research.
help Cepheus FAQ
What is Cepheus named after?
Cepheus is named after King Cepheus from Greek mythology. The Greek astronomer Ptolemy included it in his second-century catalogue.
Is Cepheus one of the official constellations?
Yes. Cepheus is one of the 88 modern constellations recognized by the International Astronomical Union.
Where is Cepheus located in the sky?
Cepheus is a northern constellation. It lies in a region of sky associated with other northern constellations and is known for notable stars.
Why is Cepheus important in astronomy?
It has both historical and modern significance: Ptolemy recorded it in antiquity, and it remains an officially recognized constellation today. Its name also preserves a link to Greek mythology.
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