Astronomical Theory Section

ECLIPSES


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 Why do eclipses occur?   (1)
      Slightly revised January 2020
 How long can an eclipse last?   (1)
 Ecliptic limits   (4)
      Slightly revised October 2020
 Saros Series   (5)
      Extra info. added Nov. 2020

PLANETARY PHENOMENA

 The behaviour of the outer planets near opposition   (2)
 Periodicities in the observed position of the planets   (1)
 The orbit of dwarf planet Ceres   (3)
 Do We Really Need The Moon?   (1 to 5)
        Includes articles on the Tides (4), the recession of the Moon (3),
        and the stability of the Earth's obliquity (5)
 Why doesn't the crescent Moon point at the Sun?   (3)
 The Orbit of the Moon   (3)                               Updated March 2020
 Supermoons   (3)

GENERAL INTEREST

  Orbital Dynamics   (3)
 Blue Moons   (2)
 Artificial Satellites   (1)
  The magnitude scale of brightness   (1)
  Meridian Flips (PDF)   (2)
      May 2022


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