Bok globule

Bok globules located within the NGC 281 nebula (IC 1590 cluster).

In astronomy, Bok globules are isolated and relatively small dark nebulae, containing dense cosmic dust and gas from which star formation may take place. Bok globules are found within H II regions, and typically have a mass of about 2 to 50 solar masses contained within a region about a light year or so across (about 7047450000000000000♠4.5×10 m). They contain molecular hydrogen (H₂), carbon oxides and helium, and around 1% (by mass) of silicate dust. Bok globules most commonly result in the formation of double or multiple star systems.

单词	Cometary globule
释义	Cometary globule 英语百科 Bok globule In astronomy, Bok globules are isolated and relatively small dark nebulae, containing dense cosmic dust and gas from which star formation may take place. Bok globules are found within H II regions, and typically have a mass of about 2 to 50 solar masses contained within a region about a light year or so across (about 7047450000000000000♠4.5×10 m). They contain molecular hydrogen (H₂), carbon oxides and helium, and around 1% (by mass) of silicate dust. Bok globules most commonly result in the formation of double or multiple star systems.
随便看	Ducasse Ducasse, Jean Jules Amable Roger ducasses ducat Ducati Ducaton Ducatoon ducatoons duc bon Duccio ducciodibuoninsegna Duccio Di Buoninsegna duccios ducco Ducdame ducdenin Duc De Richelieu duc de richelieus Duc de Rivoli duc de sullies Duc de Sully duce duce Ducene ducer ducerceau

Cometary globule

Bok globule