File:Leo IV dwarf galaxy.jpeg

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English: Astronomers used the NASA/ESA Hubble Space Telescope to unmask the dim, star-starved dwarf galaxy Leo IV. This Hubble image demonstrates why astronomers had a tough time spotting this small-fry galaxy: it is practically invisible. The image shows how the handful of stars from the sparse galaxy are virtually indistinguishable from the background. Residing 500 000 light-years from Earth, Leo IV is one of more than a dozen ultra-faint dwarf galaxies found lurking around our Milky Way galaxy. These galaxies are dominated by dark matter, an invisible substance that makes up the bulk of the Universe’s mass.
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Source http://www.spacetelescope.org/images/heic1211a/
Author NASA, ESA, and T. Brown (STScI)

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current09:27, 11 July 2012Thumbnail for version as of 09:27, 11 July 20123,940 × 4,000 (10.36 MB)Jmencisom (talk | contribs)

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