Winchell, Alexander, 1824-1891 · Chicago, S.C. Griggs and company · leaf 120
NEBULAR HEAT. 91 stars. The parts of this nebula are, therefore, in motionwith reference to each other. The Trifid Nebula has beenshown by the same investigator * to possess a propermotion in reference to the stars. This nebula consists ofthree nebulosities separated by dark passages, as shown… … Fig. 18.—The Tripid Nebula,From a Draaving by Trouvelot. 1784 to 1833, was situated a distinct triple star; butfrom 1839 to 1877 the triple star was not centrally situ-ated between the three nebulosities, but involved in oneof them.f * E. S. Holden, Am. Jour. Sci., Ill, xiv, 433-58. t On the motion…
Nebular hypothesis · Cosmogony
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