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单词 classical Cepheid
释义

Definition of classical Cepheid in English:

classical Cepheid

noun
Astronomy
  • A Cepheid belonging to a subcategory typified by the star δ Cephei (also called type I Cepheids), used to establish a period–luminosity relation for stars with a similar variability pattern, which subcategory comprises population I stars typically having a period of 5–10 days (as contrasted with type II Cepheids, which are population II stars with generally longer periods and lower luminosity).

Origin

1920s.

 
 

Definition of classical Cepheid in US English:

classical Cepheid

noun
Astronomy
  • A Cepheid belonging to a subcategory typified by the star δ Cephei (also called type I Cepheids), used to establish a period–luminosity relation for stars with a similar variability pattern, which subcategory comprises population I stars typically having a period of 5–10 days (as contrasted with type II Cepheids, which are population II stars with generally longer periods and lower luminosity).

Origin

1920s.

 
 
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更新时间:2025/3/4 6:36:25