maybe we should have a forum section for radio astronomy
and its not just hydrogen line at 1420 MHz there is also mm wavelengths and LF and VLF work for jupiter and earth working too!
also things like meteor scatter, moon bounce and aurora all have radio interests in astronomy
there is quite an active deep sky network too where the amateurs are even supporting NASA's STEREO A and B reception and data collection programme.
All in all quite a lot going on in the radio spectrum regards astronomy