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单词 bok globule
释义

Bok globulen.

Brit. /bɒk ˈɡlɒbjuːl/, U.S. /ˌbɑk ˈɡlɑbˌjul/
Origin: From a proper name, combined with an English element. Etymons: proper name Bok , globule n.
Etymology: < the name of Bart Jan Bok (1906–83), Dutch-born U.S. astronomer who studied these globules + globule n.Bok and Reilly named the clouds globules in 1947 (see quot. 1947 at globule n. 5).
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).
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n.1969
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