Ihringen:
www.ihringen.de
Astro:
NASA Homepage
http://www.nasa.gov
SuW-Homepage
http://www.mpia-hd.mpg.de/suw/suw
Picutres of Space
http://spacescience.nasa.gov/images.html
Messier-Objekte
http://www.seds.org/messier/objects.html#nebula
Observational and Computational Amateur Astronomy
http://www.xmission.com/~dnash/astrodir/astro.html
The University of Arizona Astro Club images of Messier Objects
http://www.seds.org/messier/more/m-uac.html
Sonstiges:
Deutsches Museum
http://www.deutsches-museum.de/
www.badische-zeitung.de/epaper