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Hubble illuminates cluster of diverse galaxies SPACE TELESCOPE SCIENCE INSTITUTE NEWS RELEASE Posted: February 6, 2007
This image from NASA's Hubble Space Telescope shows the diverse collection of galaxies in the cluster Abell S0740 that is over 450 million light-years away in the direction of the constellation Centaurus.
The giant elliptical ESO 325-G004 looms large at the cluster's center.
The galaxy is as massive as 100 billion of our suns. Hubble resolves
thousands of globular star clusters orbiting ESO 325-G004. Globular
clusters are compact groups of hundreds of thousands of stars that are
gravitationally bound together. At the galaxy's distance they appear as
pinpoints of light contained within the diffuse halo.
Other fuzzy elliptical galaxies dot the image. Some have evidence of a
disk or ring structure that gives them a bow-tie shape. Several spiral
galaxies are also present. The starlight in these galaxies is mainly
contained in a disk and follows along spiral arms.
This image was created by combining Hubble science observations taken in
January 2005 with Hubble Heritage observations taken a year later to
form a 3-color composite. The filters that isolate blue, red and
infrared light were used with the Advanced Camera for Surveys aboard
Hubble.
The Hubble Space Telescope is a project of international cooperation
between NASA and the European Space Agency (ESA). The Space Telescope
Science Institute in Baltimore conducts Hubble science operations. The
Institute is operated for NASA by the Association of Universities for
Research in Astronomy, Inc., Washington.