How the Universe Works: 1x3
Galaxies
The evolution of galaxies, from clouds of cold gas floating in space 13 billion years ago, to the vast gravitationally bound systems of today.
1 - 1Big Bang Apr. 25, 2010
1 - 2Black Holes May. 02, 2010
1 - 3Galaxies May. 10, 2010
1 - 4Stars May. 10, 2010
1 - 5Supernovas May. 17, 2010
1 - 6Planets May. 17, 2010
1 - 7Solar Systems May. 24, 2010
1 - 8Moons May. 24, 2010