These images show the Earth's sunlight on the equinoxes and solstices at exactly the same time of day (UT).

The Equinoxes have equal sunlight in the northern and southern hemispheres while the solstices have a maximum sunlight in alternate hemispheres.

Credit: Tom Ruen, Full Sky Observatory

This image was generated by my own solar system viewing software.

Other sources:

• Book: "Astronomical Formulae for Calculators, 4th edition", Jean Meeus, 1988, published by "Willmann-Bell, Inc"
• Earth flat bitmap images (ground/clouds/night) taken from NASA source:
  • http://earthobservatory.nasa.gov/Newsroom/BlueMarble/ archive copy at the Wayback Machine

Source: Earth

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[[Category:original upload 28 May 2004 2004 by Tomruen