Sharpless, Isaac, 1848-1920, Philips, G. M. (George Morris), 1851-1920, joint author · Philadelphia, J.B. Lippincott company · leaf 268
Fig. 64.—Singular Clusters. cannot be resolved into stars. These are nebulce.Some of them are clusters so far away or so faint that CLUSTERS AND NEBULAE. 263 … Fig. Go.—Great Nebula of Obion, 264 ASTRONOMY. the telescopic power is not sufficient to resolve them.It was thought for a time that as every increase ofpower resolved more and more of these into stars,when telescopes could be made great enough theywould all be so resolved. But the spectroscope is…
Astronomy
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
