The hottest part of the sun is actually its center, estimated by calculations to be about 1.57E7 Kelvin.
The corona is about  5E6 Kelvin.
The photosphere is 5,772 Kelvin.
The various layers of the sun from the center out to the photosphere decline steadily but not smoothly. Obviously there is an internal layer of the sun at the same temperature as the corona.
The corona is much hotter than the photosphere, yet we have to wait for a total solar eclipse to see the corona. Why is that?
It has over 6 layers, one of which is the corona. You can only see the corona during a total solar eclipse.
Usually, we cannot see the corona because of the brightness of the photosphere. However, during a total solar eclipse, the corona shines beautifully against the dark sky. During a partial or an annular eclipse, a ring of the photosphere is visible around the Moon and the corona is not visible.
The corona can be seen only during solar eclipses, when the main radiation from the Sun's surface is blocked by the passage of the Moon or with special instruments. The corona isn't as bright as the other parts of the sun and the solar eclips blocks that brightness.
The Corona I believe. You should check a diagram of the sun as well.The parts of the sun's atmosphere from the surface outward are the photosphere, the chromosphere, the corona, and the outer layers of the corona called the solar wind. The photosphere is the visible part of the Sun's atmosphere.The parts of the sun's atmosphere from the surface outward are the photosphere, the chromosphere, the corona, and the outer layers of the corona called the solar wind. The photosphere is the visible part of the Sun's atmosphere.the outer layer of the suns atmosphere is the coronathe outer layer of the suns atmosphere is the coronaThe outer mst part of the sun's atmosphere is called the corona.
The corona is much hotter than the photosphere, yet we have to wait for a total solar eclipse to see the corona. Why is that?
The corona, the suns atmosphere.
It has over 6 layers, one of which is the corona. You can only see the corona during a total solar eclipse.
corona* apex! You can see the corona better, but it is also visible with the naked eye but ONLY WITH APPROPRIATE PROTECTION!
The sun's corona has a temperature of 1,799,540 to 5,399540 Fahrenheit, which is significantly hotter than solar rays - the Sun's solar radiation is said to have a temperature of about 9980 Fahrenheit.
The corona of the Sun can only be seen with the naked eye during a total solar eclipse. However, with a special telescope called a coronagraph, you can view the solar corona at any time.During a solar eclipse, you can see the corona as a bright ring. But compared to the brilliance of the Sun itself, the corona is invisibly dim. That's why you can only see it when the Sun itself is hidden behind the Moon.
During the solar eclipse you see the corona and chromosphere of the sun, which are the outermost layers. These layers are very diffuse and their light is normally drowned out by that of the much brighter photosphere. During a total solar eclipse the photosphere is blocked from view, allowing you to see the dimmer layers.
The Corona-sphere and the Photosphere
Usually, we cannot see the corona because of the brightness of the photosphere. However, during a total solar eclipse, the corona shines beautifully against the dark sky. During a partial or an annular eclipse, a ring of the photosphere is visible around the Moon and the corona is not visible.
You can see Solar Flares in the Suns' Corona. corona (apex)
The outermost layer of the sun is the corona. Only visible during eclipses, it is a low density cloud of plasma with higher transparency than the inner layers.
Considering the solar atmosphere to have three layers (photosphere, chromosphere, and corona), the "middle" would be the chromosphere.