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en.wikipedia.org/wiki/Sun

The Sun is the star at the center of the Solar System. It is a nearly perfect sphere of hot plasma, with internal convective motion that generates a magnetic field via a dynamo process. It is by far the most important source of energy for life on Earth . Its diameter is about 1.39 million kilometers, i.e. 109 times that of Earth, and its ...

www.space.com/17137-how-hot-is-the-sun.html

Oct 18, 2017 ... The temperature of the sun at its core is 27 million degrees, but only about 10 million degrees on its surface.

www.scientificamerican.com/article/i-read-that-the-suns-surf

"The precise mechanism by which the corona overlying the solar surface is heated to temperatures of one to two million kelvins remains one of the outstanding problems of solar physics. It has long been suspected that turbulent motions in the lower solar atmosphere are propagated outward as waves in some form, which ...

www2.cnrs.fr/en/2587.htm

Jun 10, 2015 ... Why the Sun's atmosphere is hotter than its surface. How can the temperature of the Sun's atmosphere be as high as 1 million degrees Celsius when its surface temperature is only around 6000°C? By simulating the evolution of part of the Sun's interior and exterior, researchers from the Centre de Physique ...

www.sciencedaily.com/releases/2015/06/150617091757.htm

Jun 17, 2015 ... How can the temperature of the Sun's atmosphere be as high as 1 million degrees Celsius when its surface temperature is only around 6000°C? By simulating the evolution of part of the Sun's interior and exterior, researchers have identified the mechanisms that provide sufficient energy to heat the solar ...

coolcosmos.ipac.caltech.edu/ask/7-How-hot-is-the-Sun-

The temperature at the surface of the Sun is about 10,000 Fahrenheit (5,600 Celsius). The temperature rises from the surface of the Sun inward towards the very hot center of the Sun where it reaches about 27,000,000 Fahrenheit ( 15,000,000 Celsius). The temperature of the Sun also rises from the surface outward into the ...

www.nasa.gov/mission_pages/iris/multimedia/layerzoo.html

Chromosphere - The chromosphere is a layer in the Sun between about 250 miles (400 km) and 1300 miles (2100 km) above the solar surface (the photosphere). The temperature in the chromosphere varies between about 4000 K at the bottom (the so-called temperature minimum) and 8000 K at the top (6700 and 14,000 ...

solarsystem.nasa.gov/planets/sun/indepth

More Stats > The sun at the heart of our solar system is a yellow dwarf star, a hot ball of glowing gases. Its gravity holds the solar system together, keeping everything from the biggest planets to the smallest particles of debris in its orbit. Electric currents in the sun generate a magnetic field that is carried out through the solar ...

www.nasa.gov/feature/goddard/sounding-rockets/strong-evidence-for-coronal-heating-theory-presented-at-2015-tess-meeting

Apr 28, 2015 ... The sun's surface is blisteringly hot at 10,340 degrees Fahrenheit -- but its atmosphere is another 300 times hotter. This has led to an enduring mystery for those who study the sun: What heats the atmosphere to such extreme temperatures? Normally when you move away from a hot source the environment  ...