Galaxy Fundamentals

What kinds of galaxies are the most common?

That depends on the galaxies’ environment. Among field galaxies and group galaxies, spiral galaxies are much more common than elliptical galaxies. In rich clusters, however, the opposite is true. Interestingly, the further back in the history of the universe we look, the more common irregular and peculiar galaxies are. At all times in cosmic history, there have always been many more faint, dwarf galaxies than luminous, large galaxies like the Milky Way.


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