OK, I think we now all agree that comets display what is loosely referred to as charge-exchange-reaction, even if interpretations of this phenomena may vary? In others words, they exhibit some form of electrical behaviour?

Surely, therefore, some form of signature in the form of electromagnetic radiation is expected? In other words, 'It goes without saying' (To borrow from the lexicon of Tusenfem and Tim Thompson) that X-rays are probable?

And talking of EM radiation, didn't Alfven discover Synchroton (Very intense) radiation? If I remember rightly, it's produced by fast-moving electrons in the presence of magnetic fields. I guess its fairly important given that most of the radiation recorded by radio telescopes is derived from this mechanism?

In 1950 I think this was a remarkable suggestion, given that plasma and magnetic fields were thought to have little, if anything, to do in a cosmos filled with 'island universes' (galaxies). It provided additional evidence for the existence of extensive magnetic fields, and indicates that enormous amounts of energy may be converted, stored, and released by cosmic plasma!