Information resources:

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  • beginning of A brief discussion of general relativity

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Miscellaneous:

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1,669,187 hits in June 2019!
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Banner image: taken by Galileo in 1992 (credit: NASA/USGS).

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Last modified 8 July 2019.
Copyright © 2001-2018, 2019 by Wm. Robert Johnston. All rights reserved.