What is a Galaxy? main content.

What is a Galaxy?

Part of Hall of the Universe.

Galaxies AMNH/D. Finnin

Exhibition Text

Galaxies are titanic swarms of tens of millions to trillions of stars, orbiting around their common center of gravity. They also contain interstellar gas and dust. Galaxies show a range of shapes that astronomers group into three basic classes: spiral, elliptical, and irregular.

For Educators

Topic: Astronomy

Subtopic: Galaxies

Keywords: Astrophysics, Cosmic dust, Galaxies, Gases

Audience: General