ESO European Space Organization
One of the best astronomy pages - right out of “GOOD OLD EUROPE” -
with an extensive range of information
http://www.eso.org/gen-fac/libraries/esocat.html

Acomplete set of slides describing technical details of the European VLT (Very Large Telescope)
http://www.eso.org/outreach/epr/slides/set-02/

A set of magnificent astronomical slides
http://www.eso.org/outreach/epr/slides/set-03/
 

ESA Cassini Mission
http://www.esa.int/SPECIALS/Cassini-Huygens/SEMN3Y274OD_0.html
Atmospheric sound during Huygens decend through Titans Gas-Envelope
http://www.esa.int/SPECIALS/Cassini-Huygens/SEM85Q71Y3E_0.html

Hubble Spacetelescope
http://www.spacetelescope.org/images/html/heic0406a.html
http://hubblesite.org/

ANTENNA GALXY
http://hubblesite.org/newscenter/archive/releases/2006/46/

NASA
http://photojournal.jpl.nasa.gov/index.html

CASSINI SOLAR ECLIPSE on SATURN

http://www.astrowetter.com/titel/saturneclipse-titel.html

Pluto Mission “New Horizons” Start: Jan.2006
....and 9 (nine) years to go!

http://www.nasa.gov/mission_pages/newhorizons/main/

JPL Jet Propulsion Lab
http://www.jpl.nasa.gov/

General Astronomy Webpages
http://www.astronomie.de/
http://www.astrotreff.de/

Space Weather (Solar Effects on Earth)
http://sec.noaa.gov/today.html

Software
Imaging & Processing
http://www.videoastronomy.org/giotto.htm
http://www.msb-astroart.com/
http://www.pk3.org/Astro/index.htm
http://www.pk3.org/Astro/index.htm

Planetary Issues

MARS
http://www.dlr.de/mars-express/video
 

Ephemerides
http://cfa-www.harvard.edu/iau/Ephemerides/