Percy writes:
I sure hope you guys mean neutron stars. Neutrinos are elusive particles that do not interact much with matter.
I recall reading, approximately a decade ago, about some people who theorized that "neutrino stars" could be the source of the supermassive gravitional fields at the center of galaxies[1]. I assume since I haven't heard much since then about this that there was a flaw in this theory, some observations that could not be properly explained. In other words, the normal progress of science, removing ideas that don't fit the observed evidence. But Google confirms that some people were serious about such things for a time.
[1]: Other than the phrase "neutrino star" I don't remember much about this theory. It might have meant matter under conditions so intense that the only thing preventing further collapse would be neutrino degeneracy (how would such a thing be possible?), or it might have been something different (I didn't understand it then either, I remember that much).
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