History of Astronomy: Items: Anniversaries

• 75th Anniversary Astronomical Debate ("Great Debate")
• Anniversaries (astronomy and general) at Ozma's Arts & Science Page
• MWO Almanac
  See what happened at MWO on this date!
• onOrbit Magazine
  including section This Month in History
• Space Calendar
  including anniversaries of space exploration
  • This Month in Space History
    including anniversaries in history of astronomy
• This Month in the History of Astronomy
• Today-page

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