Irving, [Christopher], d. 1856. [from old catalog], Ortmann, Anselm. [from old catalog] · Baltimore, Md., New York, J. Murphy company · leaf 139
a goodly number of visuallymultiple stars. Q. 12. Are the components of binary multiplesystems of the same mass and brightness? A. Sometimes the components are very similar, butfrequently there is great diversity in size and bright-ness; in a number of cases a component does not emitany light at… … Fig. 31. The Great Cluster in Hercules. THE GALAXY, STAR-CLUSTERS AND NEBULAE. 117 CHAPTER XXIX. The Galaxy, Star-Clusters And Nebulae. - Q. 1. What is the galaxy, or Milky Way? A. The galaxy is a luminous belt of varying widthand brightness which surrounds the whole heavens;from Cygnus to Scorpius…
Astronomy
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