From hot to hottest. From relatively cool to fantastically hot, cold to hot? But the wrong way round?
The Suns electromagnetic observable layers - coldest nearer the interior/core to potentially unlimited hottest as you go further out to its exterior.
The Nasa mission was launched back in August to study the mysteries of the Sun's outer atmosphere, or corona. This region is strangely hotter than the star's "surface", or photosphere. While this can be 6,000 degrees Celsius, the outer atmosphere may reach temperatures of a few million degrees.
The mechanisms that produce this super-heating are not fully understood. Parker aims to solve the puzzle by passing through the outer atmosphere and directly sampling its particle, magnetic and electric fields... "We want to understand why there is this temperature inversion, as in - you walk away from a hot star and the atmosphere gets hotter not colder as you would expect."
Parker Solar Probe: Sun-skimming mission starts calling home | BBC
Massive energy potential differences?
They are shown in order of temperature from the first one at 6,000 degree C. surface, out to about 10 million degrees C. in the upper atmosphere. Yes, the Sun's outer atmosphere is much, much hotter than the surface. Scientists are getting closer to solving the processes that generate this phenomenon.
... so in this layer (and higher layers) it actually gets hotter if you go further away from the Sun, unlike in the lower layers, where it gets hotter if you go closer to the center of the Sun.
Image: Solar surface from hot to hottest | phys.org
Suns observable atmospheric layers
What is happening in the layer calmly called the solar Transition Region? Large change in temperature, energy, transformation, potential difference?
How and why is the Sun colder, less energetic, as you get further into its internal atmospheric layers and hidden core?
Photosphere - The photosphere is the deepest layer of the Sun that we can observe directly. It reaches from the surface visible at the center of the solar disk to about 250 miles (400 km) above that. The temperature in the photosphere varies between about 6500 K at the bottom and 4000 K at the top (11,000 and 6700 degrees F, 6200 and 3700 degrees C). Most of the photosphere is covered by granulation.
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 degrees F, 3700 and 7700 degrees C)
Transition Region - The transition region is a very narrow (60 miles / 100 km) layer between the chromosphere and the corona where the temperature rises abruptly from about 8000 to about 500,000 K (14,000 to 900,000 degrees F, 7700 to 500,000 degrees C).
Corona - The corona is the outermost layer of the Sun, starting at about 1300 miles (2100 km) above the solar surface (the photosphere). The temperature in the corona is 500,000 K (900,000 degrees F, 500,000 degrees C) or more, up to a few million K. The corona cannot be seen with the naked eye except during a total solar eclipse, or with the use of a coronagraph. The corona does not have an upper limit.
Layers of the Sun | NASA
The observable solar layers
You could look at the images, of the solar atmospheric layers and their temperatures that strangely reduce in heat as you go from its external atmosphere towards its inner and surface layers, in a different way.
Is the temperature a way of observing or inferring the potential differences of electrons and other stuff? Especially the incredible Transition Region that is only 60 miles wide but the temperature goes up or down from 500,000 Centigrade to only 8000 Centigrade. Does this show 'Electric' Potential Difference?