On the proper motion of the Trifid Nebula; M. 20 = H. v.; 10, 11, 12 = h. 1991, 3718 = G. C., 4355

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1877
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Abstract
IN a paper in this Journal for May, 1876, on the supposed changes in the N ehu la M. 17, I said (p. 360): "A remarkable instance of proper motion of this latter kind IS that of the Trifid Nebula G. C. 4355, which has moved since 1833 so that the remarkable triple-star which was then quite clear from the nebulosity in a dark space formed by the junction of the three dark channels, is now by the evidence of Lassell (1863) Winlock and Trouvelot (1~74) and myself (1875) well involved, the motion being confirmed hy Herschel's drawing at the Cape of Good Hope (1837) and Mason's of about the same date."It seems proper to collect the evidence now existing on this point in order to show the desirability of the study of this nebula, and because, in case the indications which we there find of a decided proper motion should be confirmed, such results would be of importance.Following I give in chronological order such extracts from published and unpublished observations of this nebula as bear on the points now under consideration, italicizing such portions as deserve particular attention.
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openalex_W2319926356 Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors E. S. Holden
Journal american journal of science
Year 1877
DOI
10.2475/ajs.s3-14.84.433
URL
https://doi.org/10.2475/ajs.s3-14.84.433
Keywords Keywords not found

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