| 单词 | keyhole nebula |
| 释义 | > as lemmasKeyhole Nebula Keyhole Nebula n. Astronomy (the name of) a small nebula in the southern sky surrounding the variable star η Carinae, with a dark central region shaped like a keyhole.η Carinae was formerly called η Argus. ΚΠ 1885 Eclectic Mag. Dec. 810/1 The star Eta Argûs..lies in the midst of that wonderful mass of luminous gas called the Keyhole Nebula. 1922 I. M. Lewis Astron. Young Folks xiv. 98 In Argo Navis is one of the finest telescopic objects in the heavens, the Keyhole Nebula. 2010 C. Stott et al. Space 217 This nebula is home to smaller nebulae, such as the Keyhole Nebula. < as lemmas |
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