Conclusion for Lab 32
"The three major types of galaxies are spiral, elliptical, and irregular. Spiral galaxies are characterized by a yellow central bulge of older stars and a flattened disk of younger blue stars, pink/red gas, and dust forming the spiral "arms." Elliptical galaxies have a more spherical shape and are comprised of mostly older stars, and so they are some shade(s) of yellow, orange, and red. Elliptical galaxies rotate more slowly than spiral galaxies, which might explain their lack of a disk. Irregular galaxies are those which don't quite fit either description."

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