How the Universe Works: Expanded Edition

Examining the universe's mechanisms, structures and phenomena in this documentary series featuring CGI and expert commentary.

Season 1, Episode 7 Alien Moons

First Aired: July 3, 2013

An updated look at different types of moons.

Watch Now

TV Premiere Dates

Because it's never too early to plan Thursday night... two months from now.

See What's New
100 Best Shows on TV

TV Guide ranks Peak TV's finest offerings

Discover Now!

My News

Sign up and add shows to get the latest updates about your favorite shows - Start Now