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Hubble observes shapes of more than 7000 faint background galaxies
- Title Hubble observes shapes of more than 7000 faint background galaxies
- Released 11/07/2003 1:58 pm
- Copyright European Space Agency, NASA and Jean-Paul Kneib (Observatoire Midi-Pyrénées, France/Caltech, USA)
Five days of observations produced the altogether 39 Hubble Wide Field and Planetary Camera 2 (WFPC2) images required to map the mass of the galaxy cluster Cl0024+1654. Each WFPC2 image has a size of about 1/150 the diameter of the full Moon. In total, the image measures 27 arc-minutes across, slightly smaller than the diameter of the Moon.
The observed warped shapes of more than 7000 faint background galaxies have been converted into a unique map of the dark matter in the cluster.
The images were taken through a red filter and have been reduced a factor of two in size.