Information resources:

• Astronomy and space
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• Physics (including space physics)

• Relativistic physics
  • beginning of A brief discussion of general relativity

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Miscellaneous:

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• Photo album
  • A photo album of churches

• What's new
  • What's new in 2018 Part 2
• Topical index
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• In my humble opinion
• FAQ on use of material from this site
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1,720,529 hits in October 2018!
over 93,826,000 hits to date!

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

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Last modified 1 December 2018.
Copyright © 2001-2017, 2018 by Wm. Robert Johnston. All rights reserved.