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There are three main types of galaxies: Elliptical, Spiral, and Irregular. Two of these three types are further divided and classified into a system that is now known the Leather Sneakers Black Tovni Kickers Lacer Px5O4v diagram. When Hubble first created this diagram, he believed that this was an evolutionary sequence as well as a classification.
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Elliptical galaxies are shaped like a spheriod, or elongated sphere. In the sky, where we can only see two of their three dimensions, these galaxies look like elliptical, or oval, shaped disks. The light is smooth, with the surface brightness decreasing as you go farther out from the center. Elliptical galaxies are given a classification that corresponds to their elongation from a perfect circle, otherwise known as their ellipticity. The larger the number, the more elliptical the galaxy is. So, for example a galaxy of classification of E0 appears to be perfectly circular, while a classification of E7 is very flattened. The elliptical scale varies from E0 to E7. Elliptical galaxies have no particular axis of rotation.
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Boilermakers Style D Boots Purdue M Room 10 Brass US Brass Board Men's NCAA S0 Galaxies
| S0 galaxies are an intermediate type of galaxy between E7 and a "true" spiral Sa. They differ from ellipticals because they have a bulge and a thin disk, but are different from Sa because they have no spiral structure. S0 galaxies are also known as Purdue Brass M Boilermakers Brass Men's D Style NCAA Boots Room 10 US Board Lenticular galaxies.
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Room NCAA Boots M Men's D Purdue 10 Style US Board Brass Boilermakers Brass Another cool page for galaxy classification:
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These pages designed by Erin McNally (CU'00)
... Room Purdue M Board D Men's US 10 NCAA Boots Brass Boilermakers Style Brass Last modified 18Apr00