The Morphological Study of Distant Galaxies
Hubble went on to take photographs (this was done on large glass plates) of tens to hundreds of galaxies. Just like Annie J. Cannon who classified stellar spectra, Hubble classified galaxies. This classification scheme is strictly morphological (based on physical appearance) and does NOT imply an evolutionary sequence.
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Elliptical Galaxy M87 |
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Lenticular Galaxy M85 |
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Bulge-dominated Spiral Galaxy M104 (Sombrero Galaxy) |
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Bulged Spiral M65 |
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Milky Way-like Galaxy M77 |
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Spiral Arm Dominated Galaxy M83 |