The main contention of the RE and UAFE (they also claim the solar eclipse is caused by the Moon) is that the Moon interposes itself between the Earth and the Sun during a solar eclipse.
Then, they are going to have to explain this:


This is
Newtonium, the first element in Mendeleev's periodic table of elements (much lighter than Hydrogen):
https://www.theflatearthsociety.org/forum/index.php?topic=30499.msg2045088#msg2045088It is emitted by the Black Sun/Rahu.
Of course, the RE/UAFE will claim that this radiation is being emitted by the Sun (Fe X).
However, this requires temperatures well in excess of 1 million degrees Celsius to be present in the solar corona.
The hypothesis regarding the very hot temperature of the solar corona originated with B. Edlen's analysis of the unusual spectral features.
https://www.frontiersin.org/articles/10.3389/fspas.2018.00009/fullHe was faced with a basic choice: either accept that at least two lighter than hydrogen elements are emitted by the Sun (even though
Newtonium is released by the Black Sun), or put forth an outrageous hypothesis where the temperature of the solar corona becomes at least 400 times hotter than the temperature of the photosphere (even though the reverse temperature gradient of the Sun contradicts every original expectation of the thermonuclear model). This implausible supposition had to be accompanied by an even more outlandish explanation: magnetic reconnection.

Now scientists think that the temperature of the solar corona can exceed even the temperature of the core itself:
https://web.archive.org/web/20080625183153/http://rocinante.colorado.edu/~mnowak/PR/text.htmlhttps://onlinelibrary.wiley.com/doi/abs/10.1002/asna.200710803In 1949, H. Friedman put forth another related hypothesis: that solar x-rays emissions had a thermal origin.
However, x-rays from the Sun are not generated thermally, electromagnetic particles are being accelerated through the Sun's own ether field to create x-rays. The cause of the solar x-rays is electrical, not thermal.
https://www.theflatearthsociety.org/forum/index.php?topic=30499.msg2057945#msg2057945 (Koronium and articles on the magnetic merging pseudo-science)
Within the context of a gaseous solar model, it is not surprising that extreme temperatures must be invoked. A gaseous Sun has no other means of producing highly ionized species.
"Since the corona must be excessively hot to produce such
ions in a gaseous context, the continuous spectrum of the K-corona
has been dismissed as a strange artifact, produced
by electronic scattering of photospheric light. Otherwise,
the coronal continuous spectrum would be indicating
that apparent coronal temperatures are no warmer than those
of the photosphere. It would be impossible for the gaseous
models to account for the presence of highly ionized
species within the outer solar atmosphere.
Current temperature estimates are
flirting with violations of both the first and second laws of
thermodynamics: it is difficult to conceive that localized temperatures
within flares and the corona could greatly exceed
the temperature of the solar core."
P.M. Robitaille
'MAGNETIC MERGING' THEORIES
What we have found means that we can describe plasma phenomena inside a finite volume only if no electric current crosses the surface. In the terminology of the magnetic field description, this means we can describe plasma phenomena inside a finite volume only if the perpendicular component of the curl is zero at every point of the surface. All theories of 'magnetic merging' (or 'field line reconnection') which do not satisfy this criterion are misleading or erroneous, and deserve no attention.
Dr. Hannes Alfven, Cosmic Plasma
https://web.archive.org/web/20130204074026/http://plasma.colorado.edu/phys7810/articles/Alfven_FieldLines_1976.pdfOn Frozen-In Lines and Field-Line Reconnection
Dr. Hannes Alfven
https://web.archive.org/web/20130204074019/http://plasma.colorado.edu/phys7810/articles/Falthammar_MovingFieldLines_2007.pdfOn the Concept of Moving Magnetic Field Lines
C.G. Falthammar
The criticism of the magnetic reconnection hypothesis was removed by Wikipedia:
https://en.wikipedia.org/w/index.php?title=Magnetic_reconnection&oldid=419843114#Criticism_of_the_reconnection_conceptDr. W. Heikkila has analysed the dayside reconnection and nightside reconnection problems:
http://adsabs.harvard.edu/full/1988Ap%26SS.144...85H (pg. 90 - 94)
However, none of the astrophysicists involved in the study of magnetic reconnection have taken into consideration the fact that the magnetic field consists of TWO STREAMS OF PARTICLES, North - South and also South - North.
https://www.theflatearthsociety.org/forum/index.php?topic=30499.msg2009680#msg2009680The modern study of the magnetic field/electromagnetism ONLY includes the South to North flow.
Yet, there are TWO continuous streams of different particles.
Whittaker proved that the potential consists of pairs of bidirectional longitudinal scalar waves, and that the same equation governs both gravity and magnetism.
The second flow/stream of particles IS THE GRAVITATIONAL WAVE, which has a dextrorotatory spin. Both flows/streams form the ELECTROGRAVITATIONAL FIELD.
That is, magnetic reconnection HAS TO BE ACCOMPANIED BY gravitational reconnection as well.
Magnetic reconnection refers to the breaking and reconnecting of oppositely directed magnetic field lines in a plasma.
However, the breaking of the magnetic field lines (South to North lines) would ALSO mean the breaking of the gravitational field lines (North to South lines).
At this point, the solar corona would become a gigantic gas centrifuge, with no outer casing and zero g force.
"The Sun is a giant ball of hot plasma held together by its gravity."
http://www.igpp.ucla.edu/public/mkivelso/refs/PUBLICATIONS/high_beta-shibasaki.pdfThe key to understanding the fallacy of the magnetic reconnection hypothesis is to understand that Whittaker proved the existence of the potential scalar waves, a bidirectional flow of magnetism/electricity and gravity: magnetic reconnection has to be accompanied by gravitational reconnection. The breaking of the magnetic lines also means the breaking of the gravitational lines, rendering that portion of the solar corona with zero g force.
A rare admission from modern astronomy:

Dr. Stuart D. Bale, UC Berkeley