Forum of Croatian Astronomers
http://connect.znanost.org/astro/

Department of Astrophysics, University of Washington,USA http://www.astro.washington.edu/

Astrophysical Institute, University of Jena, Germany, http://www.astro.uni-jena.de/

Department of Physics and Astrophysics, University of Kentucky
http://www.pa.uky.edu/

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astrophysics-arXiv.org e-Print archive
http://arxiv.org/archive/astro-ph

SIMBAD Astronomical Database
http://simbad.u-strasbg.fr/Simbad

The Aladin Sky Atlas
http://aladin.u-strasbg.fr/aladin.gml

Sloan Digital Sky Survey
http://www.sdss.org/

The Large Synoptic Survey Telescope (LSST)
http://www.lsst.org