Planetary Learning Path:

www.planetenweg.de
for the Schwarzbach-Planetary Path in Kriftel
 

Astronomical Links:

www.DasSonnensystem.de
decent website with a lot of information
http://webrum.uni-mannheim.de/ddz/edz3/astron.html
a lot of information all the way around the moon
www.hs-bremen.de
very comprehensive list of Links
 

Galleries:

http://nssdc.gsfc.nasa.gov/photo_gallery/
excellent NASA Gallery with many pics