Solar systems simulator:

• http://space.jpl.nasa.gov/

Sun information:

• http://sohowww.nascom.nasa.gov/gallery/

Sunspot cycle and auroral activity:

• http://wwwssl.msfc.nasa.gov/ssL/pad/solar/sunspots.htm
• http://www.sel.noaa.gov/pmap/
• http://www.gi.alaska.edu
• http://northernlightsnome.homestead.com/

International Earth Rotation Service:

• http://www.iers.org/

ERBE:

• http://asd-www.larc.nasa.gov/erbe/ASDerbe.html

Sunrise, sunset calculator:

• http://www.srrb.noaa.gov/highlights/sunrise/sunrise.html
  
  
  
  
  
  

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