why the corona of sun is hotter than surface temperature
Answers
It would seem that the further we are from the heat source, the colder it gets. In the case of our most important heat source, the Sun, it is not so. "The Sun has many puzzles - one of them is temperature" - says Prof. Krzysztof Murawski from the Maria Curie-Skłodowska University in Lublin, who is trying to solve this puzzle.
The surface of the Sun - the photosphere, the part of the star that glows - has the temperature of almost 5.8 thousand Kelvin (about 5.5 thousand degrees C). When we begin to move away from the surface of the Sun, the temperature of the atmosphere actually falls down politely. And at an altitude of 600 km from the Sun it is almost 15 hundred degrees cooler (4300 K). But as we move further away from the surface of the Sun, the temperature begins to rise again and gets extremely high. Temperature in the corona, a few thousand km above the surface, can reach even 2 million K. For several decades, this huge temperature difference between the surface of the Sun and its corona has puzzled scientists.
Answer:
It would seem that the further we are from the heat source, the colder it gets. In the case of our most important heat source, the Sun, it is not so. "The Sun has many puzzles - one of them is temperature" - says Prof. Krzysztof Murawski from the Maria Curie-Skłodowska University in Lublin, who is trying to solve this puzzle.
The surface of the Sun - the photosphere, the part of the star that glows - has the temperature of almost 5.8 thousand Kelvin (about 5.5 thousand degrees C). When we begin to move away from the surface of the Sun, the temperature of the atmosphere actually falls down politely. And at an altitude of 600 km from the Sun it is almost 15 hundred degrees cooler (4300 K). But as we move further away from the surface of the Sun, the temperature begins to rise again and gets extremely high. Temperature in the corona, a few thousand km above the surface, can reach even 2 million K. For several decades, this huge temperature difference between the surface of the Sun and its corona has puzzled scientists.
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