Image: HubbleTuningFork
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Description: Galaxies are very important fundamental building blocks of the Universe. Some are simple, while others are very complex in structure. As one of the first steps towards a coherent theory of galaxy evolution, the American astronomer Edwin Hubble, developed a classification scheme of galaxies in 1926. Although this scheme, also known as the Hubble tuning fork diagram, is now considered somewhat too simple, the basic ideas still hold...
Title: HubbleTuningFork
Credit: Transferred from en.wikipedia to Commons.
Author: The original uploader was Cosmo0 at English Wikipedia (Original text: None given)
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License: Public domain
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