This is a great little video that's going viral right now. Adam Winnik is the animator, and the narration is done by Carl Sagan, excerpted from his book Pale Blue Dot: A Vision of the Human Future in Space.
Pale Blue Dot - Animation from Ehdubya on Vimeo.
I cannot find text for the excerpt in its entirety (since it is taken from a book), but here is a portion of it. This might be useful for a cloze activity, or for reading along with the audio.