Modern Physics

The sun

The internal structure of the sun is made up of the photosphere, chromosphere and corona. At its core are found several elements.

Daily we perceive the day as clear, well lit. This is thanks to the light emitted by the Sun, which, by the way, is the biggest star in the solar system. The word Sol comes from the Latin word solis . In our studies, we learned that all other bodies that are part of the solar system (e.g. Earth, asteroids, comets, etc.) are orbiting the Sun.


The Sun is mainly composed of the elements hydrogen and helium, but it also has other elements such as iron, nickel, oxygen, silicon, etc.

Its energy is created in the deep zone of the nucleus, with very high temperature and pressure and nuclear reactions take place there. Studies carried out by scientists have found that 700 million tons of the element hydrogen are turned into ash of the element helium, exactly every one second.

In a part of the Sun, called the Irradiation Zone, the energy produced is transferred to another zone by the same process of propagation of light, that is, by the process of irradiation. Thus, this energy does not depend on any medium to propagate.

Another layer of the Sun is called the Convection Zone, which is where the energy produced behaves similarly to thermal convection.

The layer of the Sun that is in contact with the irradiation zone will heat up more, with this, its density will decrease, causing this layer to rise to the surface and the layer that is on the surface to descend, coming back into contact with the surface. irradiation zone. In this way, we can say that this is the same process that happens when we heat water in a container.

Internal Structure of the Sun

Photosphere – is the part of the Sun composed of numerous hexagonal structures, very small, which can also be called granules. This structure resembles a boiling liquid.

Chromosphere – not visible, as the radiation emitted is weaker than the radiation from the photosphere. It can be observed in the occurrence of eclipses, when the Moon hides the photosphere disk.

Corona – is the outermost layer of the Sun, where the prominences appear, that is, immense clouds of glowing gas that come out of the upper chromosphere. The corona consists of particles that slowly move away from the Sun and can only be seen with a total eclipse of the Sun.

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