Links 

National Space Society
 http://www.nss.org

Windows to the Universe -- University of Michigan
 http://www.windows.ucar.edu/

Space Time
 http://www.spacetimetv.com/

The National Space Society (NSS) offers live coverage, links, and an Ask The Expert capability.

As an example of a university-based group, focusing on K-12, view Windows to the Universe at the University of Michigan.

Spacetime highlights the integration of space study with math. Brought to you by PBS, fun games are included, also.