| 单词 | double star |
| 释义 | > as lemmasdouble star double star n. Astronomy two stars so near (really or visually) as not to be separately visible without a telescope; esp. when forming a physically connected system (distinctively called binary n. and adj.). ΚΠ 1781 W. Herschel in Philos. Trans. (Royal Soc.) 72 101 The second class of double stars. 1890 C. A. Young Elem. Astron. xiii. §462 Stars may be double in two ways, optically and physically..the majority of double stars must be really physically connected. < as lemmas |
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