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Below are the episodes of the Jodcast (or segments) which match the keyword active. You can continue searching by going back to the tag cloud.

• January 2007 (MP3)
  Happy New Year and welcome to the first Jodcast of 2007. We start, as always, with a round up of the past month in astronomy. We talk to Martin Hardcastle about active galactic nuclei and radio galaxies (see the fantastic cover art by Aurore Simonnet for an idea of what they look like). We also gate-crashed a recent meeting about the proposed Square Kilometre Array (SKA) to find out what it is as well as finding out about the two proposed sites. We have no ask an astronomer this month but Ian is here to tell us what we can see in January's night sky. We also get a round up of interesting astronomy podcasts and set our first ever competition. You'll have to listen to find out what the question is!
• Interview with Dr Martin Hardcastle (University of Hertfordshire) - January 2007 (MP3)
  Nick talked to Martin Hardcastle about radio galaxies and active galactic nuclei (AGN). We find out what an AGN is, what makes the nucleus active and how different types of telescope can show us different parts of an AGN.