0 Members and 1 Guest are viewing this topic.
Just another little point to add, just to clarify. It doesn't take photon's 8 minutes to travel from the interior of the sun to earth. It in fact takes millions of years for the photons from the core to reach the surface of the sun due to electromagnetic fields,reactions with atoms in the sun and other bits. Although once the photons escape the surface of the sun, then it takes 8 minutes. It is fascinating to think that the light hitting our skin in the day has been pent up inside the core of the sun for millions of years, then has just been recently free'd of its trap.
I don't quite see what your getting at? A big clump of cold hydrogen that would have initiated fusion is vastly different from the sun, for one its mass would have to be extremely huge (if the big clump we are talking about is say 50 meters big) to start the fusion in the first place assuming the fusion was not started from anything other that gravitational contraction.
What I am stating with regards to the sun or any main sequence star is accepted astrophysics as I have been taught
, in that the sun is not just a ball of burning hydrogen. The sun is comprised of different layers such as the core, photosphere, convection zones and coronasphere these all have vastly different properties. So photons emitted from the CORE (my original point) do not take 8 minutes due to there nature of interactions with the matter in the star and that includes more than just absorption and emission of the photon. Of course once the photons make there way to the surface, or any emissions from the surface will be largely unhindered then and only then will take about 8minutes 20 seconds (or so).
Hmm, fair play. I see what your saying and it definitely makes sense, although it does go directly against the grain of what I have been taught (and assumed to be true). The circumstance laid out in my teachings was that the photons themselves were conserved and that they took millions of years to reach the surface, through being absorbed and emitted as they collided with other atoms. I will have to bring that up as it seem quite a major thing to get wrong. Before I do, I don't suppose I could ask you a little more on what exactly is exchanged between the different layers? Does the photons or the energy they carry not get exchanged in any direction within a star?