Far Side of the Moon

source: https://www.youtube.com/watch?v=9F3WRMlZEy4

A very neat PBS Space Time video on how a dish (for HF radio) on the far side of the moon would look for really interesting info on the early universe.

In the early universe hydrogen atoms emitted 21 cm wavelength radio waves which have been red shifted to 21 meters today.  Hmmm, 21 meters is pretty close to that very popular ham radio band (like right smack dab in the middle :)  So hams know that the ionosphere reflects 20 meter signals back to earth, similarly it also reflects 21 meter signals back into space.  So that's a good reason for a moon radio telescope.  Putting it on the far side should eliminate problems from any ham signals on earth.

Do it, NASA !

Best Regards,
Chuck, WB9KZY
http://wb9kzy.com/ham.htm