NASA/IPAC Extragalactic Database (NED) (Popularity: )

lists names and positions of extragalactic objects and provides links to data and published literature ...
Category: Science\Physics\Astrophysics\Galaxies

X-Ray Astronomy Group - University of Cambridge (Popularity: )

Research of the group focuses on observational studies of active galaxies, clusters of galaxies, elliptical ...
Category: Science\Astronomy\Galaxies