How the Universe Works: Season 2, Episode 6

2 - 6: Comets - Frozen Wanderers

Following the journey of a comet from its beginning as cosmic detritus floating around the outer limits of the solar system to the outgassing process as the comet approaches the sun. Watch the movement of a comet as it evolves from a chunk of ice and rock into an active nucleus engulfed in a gaseous haze.