anthony morris
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Equinox

  • Space and time when the plane of the Earth's equator passes through the geometric center of the Sun's disc
    • The moment the center of the visible Sun is directly above the Earth's equator
  • Occurs twice a year
    • March 20 (Vernal or spring equinox)
    • September 23 (Autumnal or fall equinox)

Space Earth Astronomy