Galaxies



﻿﻿How are stars grouped? Stars are grouped together in galaxies. A galaxy is a large group of stars held together by gravity.

 A spiral galaxy like the picture above is tightly or loosy wound. It has a lot of dust.

An elliptical galaxy is football or basketball shaped - it has no spirals and has little or no dust.



An irregular galaxy does not have any recognizable shape. This type of galaxy may have been in a collision with another galaxy.



We are in the Milky Way galaxy