Link: Evidence that the sun has a solid surface

[MarkVitrone] " ... isn't it commonly supported that iron looses its magnetic properties in temperatures common in blacksmithing forges?"

Yes. The temperature at which this occurs is called the Curie Point, 770 degrees C or 1043 Kelvins. Above this temperature iron loses all traces of magnetism. Below this temperature iron regains all of its magnetic properties. So far as we can tell this process 100% reversible.

LB

<blockquote id="quote"><font size="2" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by Larry Burford</i>
<br />[MarkVitrone] " ... isn't it commonly supported that iron looses its magnetic properties in temperatures common in blacksmithing forges?"

Yes. The temperature at which this occurs is called the Curie Point, 770 degrees C or 1043 Kelvins. Above this temperature iron loses all traces of magnetism. Below this temperature iron regains all of its magnetic properties. So far as we can tell this process 100% reversible.
<hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">
The magnetic field of the sun is not caused by a permanent magnet but by plasma currents (dynamo effect; see science.msfc.nasa.gov/ssl/pad/solar/dynamo.htm ). Even for the earth (which obviously has a solid surface) the magnetic field is supposed to be produced dynamically by the rotation of its fluid interior.

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www.physicsmyths.org.uk
www.plasmaphysics.org.uk

I was not attempting to say that iron was causing the solar magnetism. I was replying to the ascertation that solar flare and eruption activity insofar as magnetism was related was caused by iron on the "solid" surface of the sun being attracted or repulsed. I was trying to show that iron even if it is still solid might not possess magnetic properties under the conditions of the solar surface. Mark

If I recall, materials can retain certain properties of a solid, even if far past their melting point, if put under enough pressure. There is a name for this in the geology world, but I don't know it right now. I'll look it up when I get back home...

"Regret can only change the future" -Me

There is also a hypothesis suggesting that the Earth's magnetic field is powered by a natural nuclear reactor at its core.

--Astro