University of Cambridge - IoA - X-Ray Astronomy Group - http://www-xray.ast.cam.ac.uk/ Institute of Astronomy. The research of the group focuses on active galaxies, clusters of galaxies, elliptical galaxies, and the X-ray background.
University of Cambridge - Cavendish Laboratory - Astrophysics Group - http://www.mrao.cam.ac.uk/ 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.
Rice University - http://www.physics.rice.edu/sp.cfm Department of Space Physics and Astronomy.
Mullard Space Science Observatory - http://www.mssl.ucl.ac.uk Mullard Space Science Laboratory of the University College London. Research and postgraduate teaching in astrophysics, solar physics, plasma physics, climate physics, and detector physics.
Joint Center for Astrophysics - http://www.jca.umbc.edu Collaboration between the Laboratory for High-Energy Astrophysics and the University of Maryland - Baltimore County.
Institute of Theoretical Astrophysics - http://www.astro.uio.no/ita/english.html One of the main centers for exploration of astrophysics in Oslo, Norway.