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She likens it to walking away from a campfire and feeling colder and colder until suddenly getting very hot.
The solar corona is much cooler than the sun surface. The photosphere s average temperature is around 5 800 kelvin compared to the corona s 1 to 3 million kelvin. However there are much less of those particles. Why sun s corona is much hotter than its surface. 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.
It s just weird says winebarger. Which means that the average speeds of the particles in the corona is much higher than at the surface of the sun. 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.
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. Light shone on star mystery. The mission discovered packets of very hot material called heat bombs that travel from the sun into the corona.
The corona is 10 12 times as dense as the photosphere and so produces about one millionth as much visible light. A nasa mission called iris may have provided one possible answer. The corona is much hotter. The temperature in the corona is a blistering million or so degrees celsius.
The corona is in the outer layer of the sun s atmosphere far from its surface.
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The corona is in the outer layer of the sun s atmosphere far from its surface. The temperature in the corona is a blistering million or so degrees celsius. The corona is much hotter.
