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What are irregular galaxies?

April 26, 2017Galaxies irregular

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What are irregular galaxies?

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” Spiral galaxies appear to be white disks with yellowish center bulges while elliptical galaxies are rounder, more football-shaped, and are redder. Irregular galaxies are those that are neither disklike or rounded in appearance. “Distinguish between the disk component and the spheroidal component of a spiral galaxy. Which component includes the galaxy’s spiral arms? Which includes its bulge? Which includes its halo?” The spheroidal component of a spiral galaxy is composed of the center bulge and the halo. The disk component is the thin disk which slices through the spheroidal component. The galaxy’s spiral arms are part of the disk component. “What is the major difference between an elliptical galaxy and a spiral galaxy? How is an elliptical galaxy similar to the halo of the Milky Way?” The lack of a significant disk component is the major factor differentiating an elliptical from a spiral galaxy. Therefore an elliptical galaxy is similar to the halo of the Milky Way because it resemb