Dodge, Mary Mapes, 1830-1905 · [New York : Scribner & Co.] · leaf 536
A DRAWING OF SATURN. Made by the aid of the Great Telescope of the Yerkes Observatory,by E. E. Barnard. cipal stars of the Pleiades are involved in densegaseous matter, called nebulosity, which fills theentire cluster with wispy, shredded patches andmasses of light. The entire cluster is slowly… … PHOTOGRAPH OF THE PLEIADES.Made with the ten-inch lens of the Bruce Photographic Telescope ofthe Yerkes Observatory, by E. E. Barnard. Exposure three hours,forty-eight minutes. slowly, because it takes some years of carefulobservation to detect this movement, but the realmotion must be at least…
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