2006-12-21 21:01:10 · 4 answers · asked by harry 1 in Science & Mathematics ➔ Astronomy & Space
photosphere: Definition and Much More from...
photosphere ( ) n. The visible outer layer of a star, especially of the sun. ... visible surface of the Sun. The...
www.answers.com/topic/photosphere
Comparison Activities
... visible in the outer layer (photosphere) of Sun, associated with large scale ... visible in the outer layer...
solar-center.stanford.edu/compare/comp...
Our Sun - A Closer Look
This outer layer is very dim - a million times dimmer than the photosphere and ... with the outer layer (just under the...
astronomyonline.org/SolarSystem/SunDet...
2006-12-21 21:24:20 · answer #1 · answered by Byzantino 7 · 3⤊ 3⤋
I think you will find that heat in itself is not something that can be measured. Only it's effect on something else. As the sun is always roughly the same temperature there is no way you would ever be able to tell how long it took for the waste product of heat, caused by the reaction in the core, to reach the outside layer. It is simply an impossible calculation.
2016-05-23 14:26:18 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Estimates range from 17,000 to 50 million years. From the referenced article:
"The high-energy photons (gamma and X-rays) released in fusion reactions take a long time to reach the Sun's surface, slowed down by the indirect path taken, as well as by constant absorption and reemission at lower energies in the solar mantle. Estimates of the "photon travel time" range from as much as 50 million years[7] to as little as 17,000 years [8]."
2006-12-22 02:02:58 · answer #3 · answered by Dave_Stark 7 · 0⤊ 4⤋
about a million years
2006-12-21 21:03:21 · answer #4 · answered by Anonymous · 1⤊ 4⤋