What is a galaxy?

Learn all about different types of galaxies in the universe and how they came together.

Solar System, Galaxy, Universe: What's the Difference?

Galaxies—facts and information

GALAXIES & BEYOND. What is a galaxy? A galaxy is a very large group of stars held together by gravity. Size: 100,000 ly+ Contain Billions of stars separated. - ppt download

What is a Galaxy?

What is a galaxy? - BBC Sky at Night Magazine

How Galaxies Work

Galaxy - Wikipedia

What is a galaxy? - BBC Sky at Night Magazine

1.1.4 What is a galaxy? – Earth & Space Science

What is our closest galaxy?

Galaxy, Universe & Solar System, Overview & Differences - Lesson