Information resources:

• Astronomy and space
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  • beginning of A brief discussion of general relativity

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Miscellaneous:

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1,377,097 hits in September 2019!
over 110,456,000 hits to date!

Banner image: taken by Galileo in 1992 (credit: NASA/USGS).

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Last modified 20 October 2019.
Copyright © 2001-2018, 2019 by Wm. Robert Johnston. All rights reserved.