The outside of the photosphere of the sun is invisible to the naked eye. Only during the total solar eclipse, when the light ball was covered by the moon and turned into a black sun, can we see a rose-colored ring tightly wrapped outside the light ball, with a thickness of about 654.38+00000 kilometers.

People call this circle wrapped around the ball of light the "chromosphere" of the sun. Chromosphere is equivalent to the atmospheric part of the sun.

If you look closely again, you will find that the surface of the color ball is like a sea of fire, and often tens of thousands of kilometers of red flames are suddenly ejected, sometimes in a fountain shape; Sometimes it is round; Others are round; Others are floating above chromosphere like floating clouds. We call this phenomenon "prominence", which is actually an air mass with high temperature.

On the periphery of the chromosphere and prominence, there is a beautiful layer of pearl, which we call "corona".

The corona gradually transits into interstellar space, and the outer boundary is difficult to determine. It can extend into millions of kilometers of space.

The corona has no certain shape, and its height and shape change with the number of sunspots on the photosphere. The corona also shines, but it is much darker than the sun itself, so it is usually invisible and can only be seen during a total solar eclipse. The corona, also known as the white light of the sun, is a thin gas distributed around the sun. Like a photosphere, this gas is mainly a mixture of hydrogen and some helium. Similarly, the temperature of the corona is also very high, about 65438 0 billion degrees Celsius.