Quote:
Originally posted by StarLab@Sep 25 2004, 11:30 PM
Are spiral galaxies just Ellipticals with arms...or are Ellipticals just spirals with a bulge but without the arms?
|
Ellipticals do not have gas and dust clouds. The in-fall of these is what creates the spiral arms and a steady stream of new stars. You could think of Ellipticals as being like the bulge and halo without the arms. Irregulars are generally very new galaxies, or merging galaxies.