Galaxies

__Galaxies:__ Spiral Galaxies: Elliptical Galaxies: Irregular Galaxies:
 * Shaped like a twin spiral
 * Revolves around the center
 * Have arms that spin outwards
 * Flat, disk like galaxies
 * Contains many stars
 * Little gas and dust
 * Hard to form new stars, contains mostly old ones
 * Don't realy have a shape
 * Clumped dust and stars