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physical object > natural object > celestial body > star > Population I star > Population I Cepheid > Delta Cephei
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Delta Cephei comparison table
Subject is an instance of is a kind of has definition
Population I Cepheid Population I starA Cepheid which is about 4 times more luminous than Population II Cepheids, probably because of their higher metal content (although mass may also be a factor).
Delta CepheiPopulation I Cepheid A pulsating star in the constellation Cepheus. It was the second Cepheid discovered and lent its name to the entire class of stars.

Next Population I CepheidEta Aquilae    UpPopulation I Cepheid    Previous Population I CepheidPolaris