Spiral galaxy is among the three major types of galaxies, the others being elliptical galaxy and irregular galaxy.
Spiral galaxies are twisted collection of stars and gas with beautiful shapes often made up of hot young stars.They contain a central bulge surrounded by a flat, rotating disk of stars.
The stars, gas and dust are gathered in spiral arms that spread outward from the galaxy's center.The milky way is a spiral galaxy that includes Earth and our solar system .
