One of the main centers for exploration of astrophysics in Oslo, Norway.

Mullard Space Science Laboratory of the University College London. Research and postgraduate teaching in astrophysics, solar physics, plasma physics, climate physics, and detector physics.

Research center in Denmark on the structure of space, galaxies, and stars.

Research observatory for astronomy and astrophysics. Founded in 1839.

Collaboration between Harvard College Observatory and the Smithsonian Astrophysical Observatory

Astrophysical research facility located in Cambridge, Massachusetts.

Prominent research institution in astrophysics.

Collaboration between the Laboratory for High-Energy Astrophysics and the University of Maryland - Baltimore County.

Institute of Astronomy. The research of the group focuses on active galaxies, clusters of galaxies, elliptical galaxies, and the X-ray background.

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.