| 单词 | irregular galaxy |
| 释义 | irregular galaxySEE SYNONYMS FOR irregular galaxy ON THESAURUS.COM noun Astronomy.a galaxy with no specific form and a relatively low mass. Origin of irregular galaxyFirst recorded in 1960–65 Words nearby irregular galaxyirregular, irregular astigmatism, irregular bone, irregular dentin, irregular flower, irregular galaxy, irregularity, irregular variable, irregular verb, irrelative, irrelevance Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 Scientific definitions for irregular galaxyirregular galaxy A galaxy that does not have the clearly defined shape and structure of typical elliptical, lenticular, or spiral galaxies. Irregular galaxies typically contain large amounts of gas and dust, and their stars are often young. They account for only a small percentage of known galaxies. Some irregular galaxies are the result of gravitational interactions or collisions between formerly regular galaxies. Many irregular galaxies orbit larger regular ones; the Magellanic Cloud galaxies orbiting the Milky Way are examples. Compare elliptical galaxy lenticular galaxy spiral galaxy. See more at Hubble classification system. The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved. |
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