英语词汇“population ii”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

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population II

population II n. Astronomy a population of old, red stars formed early in the history of their parent galaxy, the earliest of which are thought to be coeval with their galaxy.

ΚΠ

1952 C. Payne-Gaposchkin Stars in Making iv. 74 The names ‘Populations I and II’ were originally given by Baade to the two groups of stars. As we shall see, they probably represent extremes rather than an absolute distinction.

1992 S. P. Maran Astron. & Astrophysics Encycl. 685/1 Approximately 50 variable stars in globular clusters are presently known to be Population II Cepheids.

1996 K. Croswell Alchemy of Heavens x. 122 Intermediate population II resembles the thick disk, and halo population II is the Galactic halo.

extracted from populationn.¹

as lemmas

单词	population ii
释义	> as lemmas population II population II n. Astronomy a population of old, red stars formed early in the history of their parent galaxy, the earliest of which are thought to be coeval with their galaxy. ΚΠ 1952 C. Payne-Gaposchkin Stars in Making iv. 74 The names ‘Populations I and II’ were originally given by Baade to the two groups of stars. As we shall see, they probably represent extremes rather than an absolute distinction. 1992 S. P. Maran Astron. & Astrophysics Encycl. 685/1 Approximately 50 variable stars in globular clusters are presently known to be Population II Cepheids. 1996 K. Croswell Alchemy of Heavens x. 122 Intermediate population II resembles the thick disk, and halo population II is the Galactic halo. extracted from populationn.¹ < as lemmas
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