Broadcast Outage: We're investigating a broadcast transmission failure affecting the San Luis Valley from Antonito in the south to Salida in the north. We're working to resolve this issue. You can stream our live broadcast online or via the RMPBS+ App.

Stream live and on-demand content now on our new app:

Donate

Help tell more stories in 2026 - make a year-end gift!

Give Now

Science and Nature

Crash Course Astronomy

Galaxies, part 1: Crash Course Astronomy #38

Welcome to school without the classroom! Join host Phil Plait and discover everything there is to know about the cosmos.

Season 1 Episode 38 | 11m 51s

Galaxies contain gas, dust, and billions of stars or more. They come in four main shapes: elliptical, spiral, peculiar, and irregular. Galaxies can collide, and grow in size by eating each other.

Crash Course Astronomy

Watch more episodes

Subscribe to Our Newsletters

Get trusted Colorado stories, programs, and events from Rocky Mountain PBS straight to your inbox.

Set Your Preferences >