Season 1: Our Solar System

14 episodes · May 29, 2007 · 8.0

Prepare to be swept away on an epic journey across the universe, from the distant reaches of our solar system – past shimmering planets and dazzling stars – all the way back home to our own moon. This season takes you on a breathtaking tour through time itself, revealing the fier…

Season 2

18 episodes · Nov 27, 2007 · 6.6

Season 3

12 episodes · Nov 11, 2008 · 10.0

Season 4

12 episodes · Aug 18, 2009

Season 5

8 episodes · Jul 29, 2010

Season 6

7 episodes · Oct 25, 2011 · 7.0

Season 7

7 episodes · Apr 29, 2012 · 7.9

Season 8

4 episodes · Mar 1, 2014 · 7.0

Season 9

6 episodes · Apr 18, 2015