Get out and do some real reading instead of placing any credence in websites such as Thornhill's "Thunderbolts." Thornhill is "not even wrong" to parapharase one of my favorites.
Originally Posted by Northwind
Recommended reading: Russell M. Kulsrud's textbook "Plasma Physics for Astrophysics." It describes how plasma physics fits into modern cosmological theories. I think you'll find that the field is not the "forbidden zone" Thornhill and other PU types try to make it into in their paranoia. A brief search on Amazon should also turn up other books that should answer your questions.
"I often say that when you can measure what you are speaking about, and express it in numbers, you know something about it; but when you cannot measure it, when you cannot express it in numbers, your knowledge is of a meagre and unsatisfactory kind." - William Thompson, 1st Baron Lord Kelvin
"If it was so, it might be, and if it were so, it would be, but as it isn't, it ain't. That's logic!" - Tweedledee
This isn't right. This isn't even wrong. - Wolfgang Pauli