Talk:Solar core

message: :The following discussion is an archived discussion of the proposal. Please do not modify it. Subsequent comments should be made in a new section on the talk page. No further edits should be made to this section. 
The result of the proposal was consensus against move.--Fuhghettaboutit (talk) 07:17, 11 January 2009 (UTC)
thread_title: Untitled

message: since the sun is now 20% helium by volume, how can any hydrogen penetrate this gigantic ocean which must be below the lighter hydrogen?  — Preceding unsigned comment added by 47.200.181.61 (talk) 22:47, 5 March 2020 (UTC)
replies: text: The fact that you think they are far-fetched is exactly the reason they need to be there. Your own metabolism is volumetrically considerably higher than the heat production at the center of the Sun. If you pick the animals that make only 300 watts/cubic meter, you miss all the mammals except perhaps elephants and rhinos. 30 watts/100 kg is about the metabolism of alligators. So what metaphor do you like? 
Compost heap: http://www.bautforum.com/archive/index.php/t-97184.html
SBHarris 23:26, 1 August 2010 (UTC)

text: The MECHANISM for how the heat is generated is a completely separate question; here we're only interested in how much. Metabolism can refer to the chemical reactions, or just to the heat output (I've changed the text to specify which). Your body makes over 100 watts in 0.1 cubic meter (your volume if you weigh 100 kg). Often this is expressed in Calories=kcal per day (100 watts = 2065 kcal/day), but watts is the metric equivalent. The "time frame" is explicitly a part of expressing things in powers vs. energies, and the scale is taken care of by expressing power as an intensive quantity. Power density can be per mass, or per volume. A person-sized bit of the core of the sun generates less than 30 watts, but a person-mass of the sun's center generates less than 1% of that, due to the very high density.  I can only suggest that you get up to snuff on your basic physics, which this article requires you know (definitions of heat, temperature, power, energy, volume-specific power, etc.).  Above you say that "the numbers referred to in 'photon travel time' of 15k to 5million years can't be right." How do you know THAT? Perhaps your "common sense" ideas are off?  That's not surprising, as the center of the Sun is quite unlike anyplace you're used to. You've never seen anything with a density of 150 times that of water, either. SBHarris 18:59, 2 August 2010 (UTC)

text: We use averages because they're average. Sure, different parts of your body produce heat at different rates, but you do have a pretty good idea of the average heat production of your body, and that volume of the solar core would only produce 30% of that, or less. As for temperatures, they are a sign of what direction heat flows, but they don't tell you anything about energy withough knowing mass and heat capacity. The thermosphere high in Earth's atmosphere reaches 2500 C in the day, but is so close to vacuum (about 1 millionth of an atm) that you wouldn't be burned by it. The solar corona is 40 times hotter, but has a density of only 1/100 trillionths of an atm, so again there's not much energy/volume, and you wouldn't be burned by it. The entire corona is powered by a solar output of 1000 watts/meter going up through it (1/40,000th of the solar output), which is the same as falls in your local desert, a lot farther away. But this little bit is absorbed by a column of thin gas several times the radius of the Sun, so you see there's nothing in there to get burned WITH, because the energy powering it all is so pitiful (again, it's very close to the power of sunlight at the distance of the Earth). If you were sheilded from Sunlight from the sun, you'd have no problem with the heat or glow from the corona, even if you were inside the Corona, because it absorbs almost nothing.  Now, why is the center of the sun millions of degrees, the "surface" 5500 degrees, and the Corona millions again? Well, obviously there's some kind of disconnection that carries energy directly to the corona by some mechanism other than simply heat conduction. It's probably some kind of magnetic induction heating, such as would cause a coil to heat over a magnet, without heating the space between (which in this case is the chromosphere). SBHarris 23:33, 4 August 2010 (UTC)
thread_title:  questions: 

message: The core of the sun isn't actually hot enough to sustain nuclear Fusion. Under classical physics, there simply isn't enough energy to overcome the electromagnetic resistance of the protons to force the hydrogen nuclei together to make helium. Instead the particles have to quantum tunnel into each other, which means they randomly pop into existence at just the right spot so that nuclear fusion can happen.
:Well, it means that when 2 protons approach each other, sometimes they can approach more closely than their temperature and potential would let them. That gets them inside the nuclear binding range. Even though, the main problem is that one of them has to beta decay before they can stick, and they don't stay together that long. Protons in the core have half lives of a billion years. Once they turn into D and He-3, that goes down to minutes or seconds. Yes, all this should be mentioned. Some of it is already in proton-proton fusion. SBHarris 02:18, 13 November 2014 (UTC)
thread_title:  No mention of Quantum Tunneling? 

message: Expert on the Sun, its corona & chromosphere, photon interactions, spectrum analysis of materials, etc.  Dr. P.M. Robitaille gives a lecture. 
https://www.youtube.com/watch?v=0Lg5eR7T61A&feature=youtu.be&t=2558
This page could do with information gained from this person.
14:34, 30 November 2015 (UTC)
thread_title:  Dr. P.M. Robitaille  

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thread_title:  External links modified (January 2018) 

message: The bizarre text speculating on the iron-nickel composition of the solar core as an extrapolation from the core of Earth should probably be excised from the article, it reads poorly and communicates little.  — Preceding unsigned comment added by 70.18.13.214 (talk) 16:07, 6 January 2022 (UTC)
thread_title:  Weird text on the solar core. 

message: There's no mention of the triple alpha process anywhere. 74.135.194.87 (talk) 16:42, 27 January 2024 (UTC)
thread_title:  Helium fusion