单词 | bok globule |
释义 | Bok globulen. Astronomy. Each of many small interstellar clouds of gas and dust which appear as dark, roughly circular patches when viewed against a bright background (e.g. of stars or ionized gas), and which are associated with star formation; = globule n. 5. ΚΠ 1969 Monthly Notices Royal Astron. Soc. 144 159 The existence of dark patches seen against many of the diffuse nebulae is well-known... These are the Bok globules and are due to small absorbing clouds between us and the nebulae. 1977 Sci. Amer. June 67/2 Bok globules are among the coldest objects in interstellar space: most are only about 10 degrees Kelvin. 1991 C. A. Ronan Nat. Hist. Universe 192/3 Bok globules..are thought to be protostar material contracting into stars. 2001 Nature 11 Jan. 140/2 When the eighteenth-century astronomer Sir William Herschel first encountered a Bok globule in his telescope, he exclaimed: ‘Mein Gott, da ist ein Loch in Himmel’ (‘My God, there is a hole in the skies’). This is a new entry (OED Third Edition, March 2010; most recently modified version published online December 2021). < n.1969 |
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