It is said, that, "Most of the Helium in the Universe, is in a plasma state".
Plasma's are now talked of, as the forth state of matter, but this does not seem to be a majority opinion. Plasma's are also normally regarded, to be at a high temperature, I believe because they are formed from elements that would normally be solids at Earth temperatures.
Since the mass of Helium in the Universe is > 20% of the total mass, and the average temperature (CMB), of the Universe, is 2.7K, there must be a lot of Helium Plasma in the Universe at, or below this temperature.
My questions are:
2.7K is very close to the Lambada point of atomic Helium. Does Helium plasma, still have the same Lambada properties as atomic Helium? If so, will Helium plasma, below it Lambada point, be both superfluid and supercondutive?
Is there a point, that Helium plasma reverts to atomic Helium and what causes it to revert? I assume there is a point, since some of the small amount of Helium we still have on Earth, trapped in pockets, and which dates from the Earth's birth, would be of the plasma verity, because it origins, are in the Universe.
The majority of the Helium in the Universe, is said to be Helium-4. I presume, this is Helium-4 plasma. Apart from the properties mentioned in question 1, are there any other major differences between Helium-4 plasma and atomic Helium-4. If the answer to this question is yes, and the answer to questions 1 & 2 is no, then the differences between the two states, seems so great, that maybe, there is a case for the plasma, to have a different classification, and a different name, even though, their atomic structure, is very similar.