German Aerospace Center (DLR)
http://www.dlr.de/en/
DLR's Media Portal:
http://www.dlr.de/media/en/
DLR's flickr account:
http://www.flickr.com/photos/dlr_de/
NASA's Image of the day Gallery:
http://www.nasa.gov/multimedia/imagegallery/
ESA's Multimedia Gallery:
http://www.esa.int/esa-mmg/mmghome.pl
German Space Shop:
http://www.german-space-shop.de/
My fotohome at fotocommunity:
http://www.fotocommunity.de/pc/pc/mypics/950930