Live data from Hacker News

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

nso.edu

21–30 of 65 posts

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

#21

The Sun impresses me. So much energy to dish out, so little of that is taken by planet Earth yet it helped yield and maintain life. Now what will happen when that energy is taken away ...

We still have our core

There may be rogue planets out there sustaining life far from any star..

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

#22

I wonder if we will ever discover life inside stars. There's definitely complex stuff going on in there.

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?

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

#23
post #6

This kind of observation is a big deal for solar physics. It's been believed for decades that these small-scale (~100km and below) turbulent features are critical to understanding how energy dissipates in the Sun. And thus, how sunspots and flares form. The subject has been very qualitative but is yielding on both observational and simulation fronts. I worked adjacent to this area from the 1990s-2010s, and it had bee…

Thanks a lot for sharing your experience with us. I worked adjacent to this area from the 1990s-2010s when the topic is solar physics is definitely why this forum is one of the last "places" of the internet.

[deleted]

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

#24

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…

Obviously not based on DNA/RNA. I think it is pretty lacking in imagination to believe that DNA/RNA in liquid water is the only possible configuration of atoms that could make a self-replicating and evolving organism.

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.

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

#25

I wonder if we will ever discover life inside stars. There's definitely complex stuff going on in there.

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.

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

#26
post #6

This kind of observation is a big deal for solar physics. It's been believed for decades that these small-scale (~100km and below) turbulent features are critical to understanding how energy dissipates in the Sun. And thus, how sunspots and flares form. The subject has been very qualitative but is yielding on both observational and simulation fronts. I worked adjacent to this area from the 1990s-2010s, and it had bee…

> The subject has been very qualitative

What does this mean?

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

#27

The Sun impresses me. So much energy to dish out, so little of that is taken by planet Earth yet it helped yield and maintain life. Now what will happen when that energy is taken away ...

Why would the sun’s energy be taken away?

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

#28
post #6

This kind of observation is a big deal for solar physics. It's been believed for decades that these small-scale (~100km and below) turbulent features are critical to understanding how energy dissipates in the Sun. And thus, how sunspots and flares form. The subject has been very qualitative but is yielding on both observational and simulation fronts. I worked adjacent to this area from the 1990s-2010s, and it had bee…

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

"Qualitative" means that the field had good conceptual theories, but didn't have sufficient observational and computational resolution to determine the detailed numerical values

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

#29

The Sun impresses me. So much energy to dish out, so little of that is taken by planet Earth yet it helped yield and maintain life. Now what will happen when that energy is taken away ...

The sun will destroy the earth long before it stops providing energy.

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

#30

I wonder if we will ever discover life inside stars. There's definitely complex stuff going on in there.

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 more pessimistic, not less.
Post reply on HN