The observational evidence attests that the Sun is condensed matter, not a hot ball of gas. The Sun has a real surface (the photosphere) and an atmosphere (the chromosphere and the corona). Professor Pierre-Marie Robitaille has proposed liquid metallic hydrogen as the building block for the Sun:

Robitaille P.-M. Forty Lines of Evidence for Condensed Matter — The Sun on Trial: Liquid Metallic Hydrogen as a Solar Building Block, Progress in Physics, v.4, pp.90-142, 2013, http://www.ptep-online.com/index_files/2013/PP-35-16.PDF

The physical evidence that the Sun is condensed matter is overwhelming.

Sandia Laboratories in the USA has recently reported production of liquid metallic hydrogen in its labs.

The invalidity of Kirchhoff’s Law of Thermal Emission [1] means that Planck’s equation for thermal spectra is not universal and therefore applies only to a truly black material, such as soot, at thermal equilibrium within an enclosure. Consequently, the solar spectrum does not yield the true temperature of the Sun, only an apparent temperature. That the solar spectrum is continuous is a clear proof that the Sun is condensed matter because gases do not emit a continuous spectrum – they emit only in narrow bands. Arguments of solar line broadening by various means do not overcome this fact. Similarly, observations of the eruption of solar flares have revealed concentric transverse waves moving radially from the centre of eruption in the photosphere. Gases cannot accommodate transverse waves; only condensed matter can do that.

[1] Robitaille, P.-M., Crothers, S. J., “The Theory of Heat Radiation” Revisited: A Commentary on the Validity of Kirchhoff’s Law of Thermal Emission and Max Planck’s Claim of Universality, Progress in Physics, v. 11, p.120-132, (2015), http://www.ptep-online.com/index_files/2015/PP-41-04.PDF

http://vixra.org/pdf/1502.0007v1.pdf

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