Galaxy Cluster Abell 520 (HST-CFHT-CXO Composite)
Leo IV HST/ACS
Galaxy Abell 1689's "Gravitational Lens" Magnifies Light of Distant...
X-Rays Emanate From Heated Material Falling Into Black Hole
X-Rays Shine From Heated Material Falling Into A Black Hole
Cosmic Evolution Survey - Visible (Baryonic) Matter
Bright Knot of Light From Supernova in Galaxy Cluster MS1054-0321
HST ACS/WFC Image of NGC 3021
Dark Matter Map in Galaxy Cluster Abell 1689
Hubble Finds Dark Matter Ring in Galaxy Cluster
Abell 901b
Abell 901a
Merging Galaxy Cluster Abell 520
Galaxies Magnified by Galaxy Cluster Abell 1689's "Gravitational Lens"...
"Polar Ring" Galaxy NGC 4650A: A Disk of Red Stars Ringed...
Hubble Helps Astronomers Map Dark Matter in Abell 1689
Color Images of Quasar 1208+101Split by Gravitational Lenses
NGC 3021 NICMOS/ACS Detail 1
Giant Disk of Cold Gas and Dust Fuels Possible Black Hole at the Core...
Pandora's Cluster – Abell 2744
Full Resolution Image Single HST ACS COSMOS Tile
Cosmic Evolution Survey - Dark Matter
Leo IV Stars
Hubble and Chandra Composite of the Galaxy Cluster MACS J0025.4-1222
Galaxies Magnified by Galaxy Cluster Abell 1689's "Gravitational Lens"...
Galaxies Magnified by Galaxy Cluster Abell 1689's "Gravitational Lens"...
Galaxies Magnified by Galaxy Cluster Abell 1689's "Gravitational Lens"...
Visible-Light and X-Ray Composite Image of Galaxy Cluster 1E 0657-556
Galaxies Magnified by Galaxy Cluster Abell 1689's "Gravitational Lens"...
Visible-Light and X-Ray Composite Image of Galaxy Cluster 1E 0657-556
Abell 1689 Hubble ACS/WFC
NGC 3021 NICMOS/ACS Detail 2
Dark Matter Distribution in Supercluster Abell 901/902
Searching for Dark Matter in a Galaxy Cluster
Galaxies Magnified by Galaxy Cluster Abell 1689's "Gravitational Lens"...
Galaxy Cluster MS1054-0321
SW Group
Galaxy Cluster Abell 520's Mass (HST WFPC2)
Abell 902
NGC 3021 NICMOS/ACS Detail 4
Galaxy Cluster MS1054-0321
Galaxy Cluster Abell 520 (CFHT and HST)
NGC 3021 NICMOS/ACS Detail 3
Leo IV HST/ACS
Leo IV Field SDSS
Background Galaxies in Leo IV Field