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Three Layers of the Sun's Atmosphere

What are the Three Layers of the Sun’s Atmosphere?

Posted on March 1, 2021September 21, 2021 By Chaitali Gupta

The sun is at the center of our Solar System. It is a ball of hot plasma with a diameter of 109 Earth placed side-by-side and a mass of 330,000 times the mass of Earth.

The composition of the Sun’s atmosphere is approx. 73% of Hydrogen and approx. 25% of Helium, with smaller quantities of Oxygen, Carbon, Neon, and Iron.

Sun does not have a solid surface or a solid core. However, the different layers of the Sun’s atmosphere produce energy which illuminates the Sun.

The inner layers of the Sun include: Core, Radiative Zone, and Convection Zone.

The outer layers of the Sun include: the Photosphere, the Chromosphere, the Transition region, and the Corona.

Inner layers

Core: With a temperature of approximately 15 million K and 20% of the size of the solar interior, it is the hottest part of the Sun.

Radiative Zone: The light that the core generates is transported through this region. This region is at a 25% distance from the solar interior, extending up to 70% of the way to the surface.

Convection Zone: The outermost layer of the solar interior, this region is approximately 200,000 kilometers thick. It transports the energy from the Radiative zone to the surface.

Outer Layers

Photosphere: It is the deepest layer in the outer shell. It extends up to 400 Km from the solar surface. The temperature varies between 6500 K at the bottom and 4000 K at the top.

Chromosphere: This region is between 400 km and 2100 km above the solar surface. The temperature in this region varies between 4000 K at the bottom and 8000 K at the top.

Transition Region: This is a narrow layer of 100 km between the Chromosphere and the Corona. The temperature in this region rises to 500,000 K.

Corona: This the outermost layer of the Sun. The layer extends for about 2100 km above the Photosphere. The temperature in this region is 500,000 K or up to a few million K. The corona can only be seen during a total solar eclipse or with a Coronagraph.

Solar Energy Tags:layers of the sun, What are the three layers of the sun's atmosphere

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