Lowell, Percival, 1855-1916 · New York, The Macmillan company · leaf 39
Great Nebula in Orion — after Ritchey. cently discovered and of most pregnant import,—thespiral nebulae. In 1843 when Lord Rosses giant speculum, six feet i8 THE EVOLUTION OF WORLDS across, was turned upon the sky, a nebula was broughtto Hght which was unHke any ever before seen. It was … Great Nebula in Andromeda — after Ritchey. neither irregular like the great nebula in Orion nor roundlike the so-called planetary nebulae,—the two greatclasses at that time known, — but exhibited a striking BIRTH OF A SOLAR SYSTEM 19 spiral structure. It proved the forerunner of a remark-able…
Cosmogony
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
