Sunday, 6 September 2009

cosmology - Available data on the Milky way around 1920

In a book by Alexander Moszkowski, there is an Einstein quote about a hypothetical size of the universe (100 million Light years). Moszkowski claims that Einstein had deduced that from the gravitational constant and the mass distribution of the Milky Way, as known around 1920. My question:



What was the data and the best estimate of the mass density of the Milky Way, back then in 1920?

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