irregular galaxy - Hutchinson encyclopedia article about irregular galaxy Printer Friendly
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irregular galaxy

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irregular galaxy

Class of galaxy with little structure, which does not conform to any of the standard shapes in the Hubble classification. The two satellite galaxies of the Milky Way, the Magellanic Clouds, are both irregulars. Some galaxies previously classified as irregulars are now known to be normal galaxies distorted by tidal effects or undergoing bursts of star formation (see starburst galaxy).
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Neff suggests that gravitational pull from another galaxy that passed nearby, perhaps the irregular galaxy M82, could have helped form the ring-shaped feature.
Heavenly bodies make their UV film debut by Cowen, Ron / Science News
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