Galaxies
Show: How the Universe Works --> Season: 1 - Season 1
AirDate: 5/10/2010
Runtime: 42
Voting: 7.8 (4)

Overview: The evolution of galaxies, from clouds of cold gas floating in space 13 billion years ago, to the vast gravitationally bound systems of today.
Lawrence Krauss
Himself
Michio Kaku
Himself
Michelle Thaller
Herself
Phil Plait
Himself