What is a galaxy?

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

Galaxy - Wikipedia

What is a Galaxy?

What is a Galaxy?, Learn facts about Galaxies

X-ray halo hints at galaxy-building process

What is a Galaxy Types of Galaxies and Characteristics

Galaxies

Galaxies—facts and information

What is a galaxy? - BBC Sky at Night Magazine

How Many Galaxies Are There in the Universe? - The Planets

Galaxy clusters, near and far

Milky Way Galaxy, Size, Definition, & Facts

Galaxy, Definition, Formation, Types, Properties, & Facts

What Is a Galaxy? NASA Space Place – NASA Science for Kids

BBC Four - The Sky at Night, Neighbourhood Watch, What is a galaxy?