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How Hot Is The Sun?

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enotes | Valedictorian

Posted October 9, 2011 at 4:00 PM via web

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How Hot Is The Sun?

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fact-finder | Valedictorian

Posted October 10, 2011 at 4:00 PM (Answer #1)

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The surface, or photosphere, of the sun is about 10,000° Fahrenheit (5,500° Celsius). Cool, dark areas of magnetic disturbance that erupt on the photosphere, called sunspots, are only about 6,700° Fahrenheit (4,000° Celsius).

The layer of the sun's atmosphere that lies just beyond the photosphere, called the chromosphere, is only about 1,900 miles (3,000 kilometers) thick. Where it meets the photosphere, the chromosphere is about 7,800° Fahrenheit (4,300° Celsius). The temperature rises throughout the chromosphere. Where the chromosphere merges with the sun's outermost atmospheric layer, the corona, it is about 180,000° Fahrenheit (100,000° Celsius). Temperatures rise to 3,600,000° Fahrenheit (2,000,000° Celsius) in the part of the corona that's farthest from the sun.

The sun is hottest at its center—about 27,000,000° Fahrenheit (15,000,000° Celsius)!

Sources: Abell, George O. Realm of the Universe, 5th ed., pp. 225-28; Asimov, Isaac. Isaac Asimov's Guide to Earth and Space, pp. 159-61; Moore, Patrick. Atlas of the Solar System, p. 19.

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labrat256 | (Level 2) Adjunct Educator

Posted May 12, 2012 at 12:15 AM (Answer #2)

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The centre of the sun is about 15,700,000 kelvins (at that heat and inaccuracy, similar to Celsius) according to our best models, although we could never really know. The photosphere (the visible outer shell of the sun) is about 5,780 kelvins (about 5,510 celsius). 

Curiously, the bit just outside what we would consider the 'surface' (corona) of the sun is actually hotter than the 'surface' itself. The corona of the sun is about 5,000,000 kelvins.

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Yojana_Thapa | Student , Grade 10 | eNoter

Posted January 27, 2014 at 12:41 AM (Answer #3)

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5,778 K

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parama9000 | Student , Grade 11 | Valedictorian

Posted January 27, 2014 at 12:50 PM (Answer #4)

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It is approx. 5510 Celsius degrees.

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