Lowell, Percival, 1855-1916 · New York, The Macmillan Company · leaf 41
Great Nebula in Orion —• after Ritchey. cently discovered and of most pregnant import,—thespiral nebulae. In 1843 when Lord Rosses giant speculum, six feet 18 THE EVOLUTION OF WORLDS across, was turned upon the sky, a nebula was broughtto light which was unlike 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 nebulze,—the two greatclasses at that time known, — but exhibited a striking BIRTH OF A SOLAR SYSTEM J9 spiral structure. It proved the forerunner of a remark-able…
Cosmogony
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