Discovery of its Galaxian Nature
The modern history of M31 is dominated by the pioneering work of Edwin Hubble, using the Mt. Wilson 100-inch telescope during the first few years of its operation. This chapter is largely a summary of Hubble’s accomplishments in pulling together a wide variety of observations that showed beyond a doubt that M31 is an external galaxy and that it contains many of the features and contents that we had already recognized in our Galaxy. Hubble published a comprehensive paper on the galaxy in 1929 (Hubble 1929).
KeywordsLight Curve Magellanic Cloud Small Magellanic Cloud Classical Cepheid External Galaxy
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