Galaxy

= Galaxy =

A galaxy is a large group of stars, gas, and dust all mixed together. It is held together by gravity.

The different types of galaxies are described below. Elliptical galaxies have a round shape. The round shape is like an oval. There is not a lot of gas and dust inside of them, and the stars are not as bright as younger stars.

Irregular galaxies don`t really have any shape. They are the most common type of galaxy. The stars in this galaxy don`t shine brightly.

Spiral galaxies have a spiral shape like a pinwheel. About half of all galaxies are spirals. Their center is an s shape. It looks like little arms are coming out from the center. The arms are made up of stars. A lot of elliptical galaxies are large, the irregular galaxies are small and most spiral galaxies are medium sized.

The Milky Way is one of the biggest spiral galaxies. A long time ago there were more galaxies but they were smaller than today’s galaxies.

Katie and Madeline