Episode 2 - Close Encounters with Herschel and Planck
21 May 2009, 13:00 UTC
You don't have the right version of the adobe flash player to see this video. Please upgrade or install it at "http://get.adobe.com/flashplayer/"
Subscribe to iTunes
What are the Herschel and Planck telescopes doing in space? Why do they need to be sent far away from the Earth and sensitive are they?




