| 单词 | population i |
| 释义 | > as lemmaspopulation I population I n. Astronomy a population of relatively young, metal-rich, highly luminous stars believed to have formed from the debris of other stars, together with other young celestial objects located in the galactic disc. ΚΠ 1951 Astrophysical Jrnl. 113 413 Highly luminous stars of population I. 1975 L. Gratton in G. Setti Struct. & Evol. Galaxies 30 Apparently, during a time as short as a few times 108 years all the halo population II stars have been formed and since then only population I stars have been born. 1992 S. P. Maran Astron. & Astrophysics Encycl. 729/2 A subgroup of the δ Scuti variables may be astrophysically different from the normal Population I δ Scuti variables: the SX Phe stars (Population II). < as lemmas |
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