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Simulation / Jahreszeiten

http://www.schoolsobservatory.org.uk/astro/textb/phys/seasonsanim.htm

http://www.astro.uiuc.edu/projects/data/Seasons/seasons.html

Steckbrief / Erde

Sternbilder

Nordafrika, Sahara

Funktionskartierung / Michelstadt (Zentrum)