Institute of Theoretical Astrophysics  
   One of the main centers for exploration of astrophysics in Oslo, Norway.
   http://www.astro.uio.no/ita/english.html

Mullard Space Science Observatory  
   Mullard Space Science Laboratory of the University College London. Research and postgraduate teaching in astrophysics, solar physics, plasma physics, climate physics, and detector physics.
   http://www.mssl.ucl.ac.uk

Theoretical Astrophysics Center in Copenhagen  
   Research center in Denmark on the structure of space, galaxies, and stars.
   http://www.tac.dk/

Harvard College Observatory  
   Research observatory for astronomy and astrophysics. Founded in 1839.
   http://cfa-www.harvard.edu/hco/index.html

Harvard-Smithsonian Center for Astrophysics  
   Collaboration between Harvard College Observatory and the Smithsonian Astrophysical Observatory
   http://cfa-www.harvard.edu/

Smithsonian Astrophysical Observatory  
   Astrophysical research facility located in Cambridge, Massachusetts.
   http://cfa-www.harvard.edu/sao-home.html

Max-Planck-Institut fuer Astrophysik, Garching  
   Prominent research institution in astrophysics.
   http://www.MPA-Garching.MPG.DE/

Laboratory for High-Energy Astrophysics  
   Scientists at NASA's Goddard Space Flight Center laboratory for high-energy astrophysics study some of the most extreme phenomena in the Universe.
   http://lhea.gsfc.nasa.gov

Joint Center for Astrophysics  
   Collaboration between the Laboratory for High-Energy Astrophysics and the University of Maryland - Baltimore County.
   http://www.jca.umbc.edu

Oxford Theoretical Astrophysics  
   Research into mathematical modelling and numerical simulation of stars and stellar atmospheres, the solar system, our Galaxy and other galaxies and the structure of the universe.
   http://hermes.physics.ox.ac.uk/users/Astrophysics/

University of Cambridge - IoA - X-Ray Astronomy Group  
   Institute of Astronomy. The research of the group focuses on active galaxies, clusters of galaxies, elliptical galaxies, and the X-ray background.
   http://www-xray.ast.cam.ac.uk/

University of Cambridge - Cavendish Laboratory - Astrophysics Group  
   A wide-ranging program of research, including the Mullard Radio Astronomy Observatory, situated at Lord's Bridge. Group members, research interests, publications, surveys and catalogues, other resources.
   http://www.mrao.cam.ac.uk/

University of Cambridge - DAMTP - Astrophysical Fluid Dynamics and Non-linear Patterns  
   Department of Applied Mathematics and Theoretical Physics. Research, members, seminars, publications.
   http://www.damtp.cam.ac.uk/user/afdnld/

Istituto di Astrofisica Spaziale e Fisica Cosmica, Bologna  
   Research projects: observations in the microwave, infrared, optical, X-ray and gamma ray energy bands, and observations of cosmic rays.
   http://www.tesre.bo.cnr.it/

Pulsar Research at Bologna  
   Students and research information.
   http://tucanae.bo.astro.it/pulsar/

The UC Santa Barbara Astrophysics Project  
   The astrophysics web site at the physics department of UCSB.
   http://www.deepspace.ucsb.edu/

National Astrophysics and Space Science Programme  
   A joint venture of various South African universities, open to students from all over Africa.
   http://www.star.ac.za/

Rice University  
   Department of Space Physics and Astronomy.
   http://www.physics.rice.edu/sp.cfm