Spiral Galaxy Facts & Definition

A description of spiral galaxies, a family of galaxies that includes Earth

Distant galaxy is a twin of our own Milky Way

Facts About Galaxy Learn Important Terms and Concepts

Spiral galaxy - Wikipedia

Types of Galaxies - Spiral, Elliptical & Irregular Galaxies

Galaxies HubbleSite

Romeo and Juliet: The Story of Galaxy Collisions

10 Weird Things You (Probably) Didn't Know About the Milky Way

What is a Galaxy? Definition and Types of Galaxies, Spiral Galaxies

Spiral Density Wave Theory, Overview, Galaxy Types & Examples - Video & Lesson Transcript