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On 2024-10-07 1:08, Brett wrote:Note to Brett - gravity waves in a fluid are completely different from gravitational waves, such as those generated by black hole collisions and detected by LIGO. You probably have some other magic snake oil beliefs about those, but don't get them confused with gravity waves in a fluid.Lawrence D'Oliveiro <ldo@nz.invalid> wrote:Stratified fluid (non-plasma) atmospheres can support pond-like waves:On Fri, 4 Oct 2024 17:59:03 -0000 (UTC), Brett wrote:>
>A gas cannot emit the spectrum we see from the sun, liquid metallic>
hydrogen can.
The spectrum of the Sun is primarily the continuous emissive one of a
“black body” at a surface temperature of 6500K or thereabouts.
>
Superimposed on that are absorption lines corresponding to a range of
elements, representing cooler substances in the surrounding “photosphere”,
I think it’s called.
>
Which of these lines do you think is characteristic of this mythical
“liquid metallic hydrogen” of yours?
>
Fun fact: originally it was thought that those lines in the spectra of the
Sun and other stars were characteristic of the entire makeup of the bodies
concerned. In other words, they were full of elements much like those that
make up the Earth and other planetary bodies.
>
A young doctorate student named Cecilia Payne, after some careful study,
came to the remarkable conclusion that stars were mostly hydrogen and
helium, and these spectral lines were due, in effect, to relatively small
amounts of contaminants in among that bulk of hydrogen and helium.
>Gases do not show the pond ripples from impacts that we see from the sun>
surface.
What “impacts on the sun surface”?
Watch the first few minutes of the first video in the playlist to see a
solar eruption and some of that mass crashing back down on the sun surface,
causing pond ripples. The idea of a plasma gas sun dies right there.
https://en.wikipedia.org/wiki/Gravity_wave#Atmosphere_dynamics_on_Earth.
Plasma can support /many/ kinds of waves because of the coupling of the charged particles to magnetic fields:Without having seen the video, my gut instinct is that a liquid surface on the sun could not come close to explaining any easily discernable waves.
https://en.wikipedia.org/wiki/Waves_in_plasmas
I don't claim to know what kind of wave was shown in the video of the solar eruption -- intuitively I would plump for gravity waves. But I don't think liquid metallic hydrogen is needed to explain it.
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