Talk:Sun

Unsafe conclusion in Motion and location

Under the subtitle "Motion in the Solar System"

There is an unsupported conclusion with an orphan reference. To wit: "[…] The orbits of the inner planets, including of the Earth, are similarly displaced by the same gravitational forces, so the movement of the Sun has little effect on the relative positions of the Earth and the Sun or on solar irradiance on the Earth as a function of time.[140] […]"

Checking footnote 140 reveals:

Retraction of: Scientific Reports 10.1038/s41598-019-45584-3, published online 24 June 2019 The Editors have retracted this Article. After publication, concerns were raised regarding the interpretation of how the Earth-Sun distance changes over time and that some of the assumptions on which analyses presented in the Article are based are incorrect.The analyses presented in the section entitled “Effects of SIM on a temperature in the terrestrial hemispheres” are based on the assumption that the orbits of the Earth and the Sun about the Solar System barycenter are uncorrelated, so that the Earth-Sun distance changes by an amount comparable to the Sun-barycenter distance. Post-publication peer review has shown that this assumption is inaccurate because the motions of the Earth and the Sun are primarily due to Jupiter and the other giant planets, which accelerate the Earth and the Sun in nearly the same direction, and thereby generate highly-correlated motions in the Earth and Sun. Current ephemeris calculations [1,2] show that the Earth-Sun distance varies over a timescale of a few centuries by substantially less than the amount reported in this article. As a result the Editors no longer have confidence in the conclusions presented. S. I. Zharkov agrees with the retraction. V. V. Zharkova, E. Popova, and S. J. Shepherd disagree with the retraction.

[1] Folkner, W. M., Williams, J. G., Boggs, D. H., Park, R.S. & Kuchynka, P. The Planetary and Lunar Ephemerides DE430 and DE431. "The Interplanetary Network Progress Report", Volume 42–196, February 15, 2014.

[2] JPL Horizons on-line solar system data. https://ssd.jpl.nasa.gov/?horizons

Reference: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7055216/

"Heated to incandescence"

I think "heated to incandescence" is redundant, since the same sentence already mentions hot plasma. Can a hot plasma be "heated to incandescence"? Perhaps "to incandescence" should be dropped so that the sentence would be "It is a nearly perfect ball of hot plasma, heated by nuclear fusion..." Brandmeister^talk 14:44, 27 September 2022 (UTC)

"Conversely, the visible light we see is produced as electrons react with hydrogen atoms to produce H− ions"

How can this have a black body spectrum? Oscar Blauman 16:04, 30 September 2022 (UTC) — Preceding unsigned comment added by Omblauman (talk • contribs) Furthermore: "The photosphere is tens to hundreds of kilometers thick, and is slightly less opaque than air on Earth." How a BB can be less opaque than something else?