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Hubble sequence

File:Hubble_Tuning_Fork_diagram.svg · Wikimedia Commons · See Wikimedia Commons

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Hubble sequence

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Also known as Hubble classification

morphological classification scheme for galaxies invented by Edwin Hubble

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Hubble sequence photo.png
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Galaxy morphological classification
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The Hubble sequence is a morphological classification scheme for galaxies published by Edwin Hubble in 1926. It is often colloquially known as the Hubble tuning-fork diagram because the shape in which it is traditionally represented resembles a tuning fork. It was invented by John Henry Reynolds and Sir James Jeans.

Tuning-fork style diagram of the Hubble sequence

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