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It s just weird says winebarger.
The solar corona is much cooler than the sun surface. The mission discovered packets of very hot material called heat bombs that travel from the sun into the corona. However there are much less of those particles. The corona is 10 12 times as dense as the photosphere and so produces about one millionth as much visible light. The corona is in the outer layer of the sun s atmosphere far from its surface.
She likens it to walking away from a campfire and feeling colder and colder until suddenly getting very hot. A nasa mission called iris may have provided one possible answer. Corona is the place where flares or solar surface explosions cause sudden energy release fig 1 and these mass ejections are closely related to the occurrence of magnetic storms on earth. Although the reason is unknown the sun s corona is hotter by a factor of 150 450 than the effective temperature on the surface of the sun.
At first glance it seems that the sun s atmosphere called the corona is. Abstract the processes that heat the solar and stellar coronae to several million kelvins compared with the much cooler photosphere 5 800 k for the sun are still not well known1. The sun s corona is much hotter by a factor from 150 to 450 than the visible surface of the sun. Yet the corona is hundreds of times hotter than the sun s surface.
One of the biggest mysteries in solar physics is how is it possible that the sun s surface is colder than its atmosphere. The corona is much hotter. Which means that the average speeds of the particles in the corona is much higher than at the surface of the sun. But the temperature at the sun s surface the source of that energy is a relatively balmy 5 500 degrees.
The photosphere s average temperature is around 5 800 kelvin compared to the corona s 1 to 3 million kelvin.
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The photosphere s average temperature is around 5 800 kelvin compared to the corona s 1 to 3 million kelvin. But the temperature at the sun s surface the source of that energy is a relatively balmy 5 500 degrees. Which means that the average speeds of the particles in the corona is much higher than at the surface of the sun.
