File:Leo IV dwarf galaxy.jpeg
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Summary
| Description |
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. |
| Date | |
| Source | http://www.spacetelescope.org/images/heic1211a/ |
| Author | NASA, ESA, and T. Brown (STScI) |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 10:27, 11 July 2012 | | 3,940 × 4,000 (10.36 MB) | wikimediacommons>Jmencisom |
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