A text-book of general astronomy : for colleges and scientific schools (1888)
Young, Charles A. (Charles Augustus), 1834-1908 · Boston ; London : Ginn & Company · leaf 196
a low magnifying power, it looks like rough draw-ing-paper. With higher powers it is seen to be, as shown inFig. 95, made up of a comparatively darkish background sprinkledover with grains, or nodules, as Herschel called them, of some-thing much more brilliant, — like snowflakes on gray cloth,…
Astronomy
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