"“As Harold Zirin writes in his monograph on the Sun:[80] “On the other
hand, we observe that the abundance of the two ions in the corona is
nearly equal. […] So, the Saha equation is off by a factor of 100
trillion times.”” [Unzicker, Alexander. The Liquid Sun: A Coming
Revolution in Astrophysics (p. 121). Kindle Edition.]
“something every practitioner in a lab would call a vacuum.[31] An
illusory equation Such a low density is already suspicious, but one
should keep in mind that Saha also assumed a local thermal equilibrium.
It is disconcerting that his equation, however reasonable from a
theoretical point of view, has never been put to the test in a
laboratory. Its validity remains entirely conjectural. On top of this,
the Saha equation makes grossly wrong predictions regarding the
abundance of ions in the solar atmosphere. As the distinguished
astrophysicist Harold Zirin points out: [32] “Although errors of such
magnitude appear ridiculous, their existence was discovered only in the
last 30 years; and the Saha equation is so convenient to use that one
may still find it occasionally applied in the current astrophysical
literature to problems in the solar” [Unzicker, Alexander. The Liquid
Sun: A Coming Revolution in Astrophysics (pp. 45-46). Kindle Edition.]
“atmosphere, where it gives errors of factors of millions.” Zirin is
quite harsh in his general assessment: [33] “For some years after the
discovery of the quantum theory and the Saha ionization theory,
astrophysicists were ignorant enough of the problems of nonequilibrium
thermodynamics to use these formulas blindly to calculate and explain
everything.””