Moulton, Forest Ray, 1872-1952 · New York, The Macmillan company · leaf 211
ing the most magnificent object in the wholeheavens. It covers more than a square degree in the sky,and the spectroscope shows it to be a mass of glowing gaswhose distance is probably several million times as great asthat to the sun, and whose diameter is probably as great as 164 AN INTRODUCTION TO… … FiQ. 61. — The Great Orion Nebula. Photographed by Ritchey with thetwo-foot reflector of the Yerkes Observatory. are of great luminosity, and a considerable fraction of themare variable or double. CH. V, 100] THE CONSTELLATIONS 165 99. Canis Major (The Greater Dog). — The constellationCanis Major…
Astronomy
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