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Scientists discover Kelvin-Helmholtz Instability on the surface of the Sun

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Re: Scientists discover Kelvin-Helmholtz Instability on the surface of the Sun

#51

Post by Filligree »

andrewflnr wrote: post #30
ReptileMan wrote: post #22

Earlier quoted context omitted.

You need some form of plasma that is stable and able to self organize. Is there any part of the physics where this is possible?

Stuff like a field-reversed configuration comes to mind. https://en.wikipedia.org/wiki/Field-reversed_configuration Conceivably, more complex plasma configurations could exist that are self-stabilizing enough to, you know, exist, but unstable enough to interact with each other in complex ways. Realistically... I doubt it. I'd love to hear from someone who knows about plasma dynamics, but I'd expect their answer to be…

I want to learn if it would one day be possible to engineer something like that. Unfortunately I think that even the theory is post-singularity territory, so... maybe in the 2030s?

Re: Scientists discover Kelvin-Helmholtz Instability on the surface of the Sun

#53

Post by inigyou »

Filligree wrote: post #51
andrewflnr wrote: post #30

Earlier quoted context omitted.

Stuff like a field-reversed configuration comes to mind. https://en.wikipedia.org/wiki/Field-reversed_configuration Conceivably, more complex plasma configurations could exist that are self-stabilizing enough to, you know, exist, but unstable enough to interact with each other in complex ways. Realistically... I doubt it. I'd love to hear from someone who knows about plasma dynamics, but I'd expect their answer to be…

I want to learn if it would one day be possible to engineer something like that. Unfortunately I think that even the theory is post-singularity territory, so... maybe in the 2030s?

The singularity already came and went. It was the Internet.

Re: Scientists discover Kelvin-Helmholtz Instability on the surface of the Sun

#54

Post by inigyou »

zakki wrote: post #25
shevy-java wrote: post #19

Earlier quoted context omitted.

You mean inside of a sun or so? Current life depends heavily not only on RNA/DNA, but also water. I can not see how it is possible to have an information system (such as RNA/DNA) without water possible. Enzymes, even of extremophilic organisms, have a fairly small range where they can work. I think the temperature record is at about 122°C or so as highest temperature. At 150°C, if I recall correctly, ATP has a life c…

In Islamic teaching it is said that there are 2 other life forms. The first one is Angels, they are created from light. The second one is Jinn, they are created from smokeless fire. Jinn is like human being, they need to drink, eat, have sex, have family,etc. I don't know how to prove that.

You could take a picture of an Angel and a Jinn.

Re: Scientists discover Kelvin-Helmholtz Instability on the surface of the Sun

#56

Post by left-struck »

mturmon wrote: post #45
esikich wrote: post #36

Earlier quoted context omitted.

It's highly filtered, you are only getting a small slice of all of the wavelengths. Only a tiny fraction of all that energy hits the photo collector. I believe the collector is also actively cooled, but I might be wrong there.

Yes, just 0.5nm of spectrum in the instrument used ( https://dkist.virtualsolar.org/vanNoortfastcam/ , see under “DataSetDescriptions.pdf”). If the pixels really are 20x20km, located at 1AU, I get 500k photons (within that bandpass) per pixel per frame at 740 Hz, not counting optical losses. Space solar instruments like HMI on SDO ( https://science.nasa.gov/mission/sdo/ ) have one or more pre-filters in front of the…

740hz is the frame rate you’re capturing at?

Re: Scientists discover Kelvin-Helmholtz Instability on the surface of the Sun

#59

Post by smolder »

NooneAtAll3 wrote: post #40
perpetuallunch wrote: post #26

Earlier quoted context omitted.

> The subject has been very qualitative What does this mean?

quality vs quantity seeing something new vs observing same stuff many many times to do statistics

Interesting that you use the phrase "quality vs quantity". Normally, I think of precision being on the side of "quality". As in, you carefully make a thing to meet a certain standard instead of making a lot of them.

In the case of "qualitative vs quantitative", despite having the same roots, I think of precision being on the side of the quantitative --with qualitative work answering yes/no questions and quantitative yielding precise measurements.

Re: Scientists discover Kelvin-Helmholtz Instability on the surface of the Sun

#60

Post by jibal »

colechristensen wrote: post #37
jibal wrote: post #24

Earlier quoted context omitted.

Imagination is great for writing science fiction but it doesn't change the laws of physics that make the sort of organization needed for life impossible. You write "configuration of atoms" but there's no such thing within stars.

There is a sort of island of complexity in the parameter space of physics where we exist in a thin film on the surface of a rock orbiting at such a distance of a star of a particular strength. It is a bit presumptuous to dismiss out of hand that this is the only possible island of complexity in the universe and there are not other sets of parameters with similar entropy-fighting characteristics.

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