| After losing the raw material needed for creating more supernovas, postcollision spiral galaxies become populated with aging stars, as are elliptical galaxies. |
| The Milky Way has about 100 globular clusters, whereas giant elliptical galaxies are surrounded by thousands of globulars. |
| Today, we can create computer models of how spiral and elliptical galaxies formed. |
| There were the familiar spiral and elliptical galaxies and some irregular shapes previously recognized. |
| Spectra of the galactic light indicate that faint red dwarfs account for 80 percent of stars in elliptical galaxies. |
| The long-standing theory has been that spiral galaxies merge with each other forming most of the elliptical galaxies in the Universe. |
