EpisodeS1E1010 min1998-03-05
The Complete Cosmos
Realm of the Comets
Looking at comets and where they originate, the Oort Cloud and the Kuiper Belt and the possibility that Pluto isn't a planet at all (recently declassified).
The Complete Cosmos
Looking at comets and where they originate, the Oort Cloud and the Kuiper Belt and the possibility that Pluto isn't a planet at all (recently declassified).