Concept in Definition ABC

The Sun is the star around which the earth moves. The Energy This is explained by the fusion phenomena that occur in it, in which helium is formed from hydrogen atoms. Its formation dates back more than four thousand five hundred million years, from gas and dust, and it is estimated that it will maintain its current appearance for another four thousand five hundred million years; after this time, it will increase its brightness while reducing its temperature, becoming a red giant star of such size that it will consume Mercury and Venus. Finally, it will transform into a white dwarf star that will gradually lose its heat.

Like the earth, the Sun shows a crushing at its poles due to the movement rotation. Astrophysics has devoted itself to analyze the way in which it is formed, developing a model with sufficient explanatory capacity for the various phenomena that are considered perceived. Thus, according to this model, the sun would be made up of the solar wind, the solar corona, the chromosphere, the photosphere, the convective zone, the radiant zone and finally the nucleus.

One of the sun's radiations is ultraviolet rays, and they are the most damaging in terms of the effect it can have on us. By reducing the density of the ozone layer, the main coverage of the Earth to mitigate the intensity of these rays, they have become a risk factor when exposing ourselves to them, constantly or for a long time. A typical case, in summer when we "sunbathe" on the beach or on the bank of a river. For this reason, the production of cosmetic products has proliferated, such as creams, bronzers or lipsticks that block, from the incorporation of chemicals, the density of the damage that ultraviolet rays can exert on U.S. One of the most severe consequences is skin cancer, although other consequences can also manifest diseases such as psoriasis (uneven skin pigmentation) or dermal burns (marked spots visible).

Galileo Galilei was one of the first to stop to observe solar activity, being able to quantify solar rotation and managing to observe sunspots. At present, this detailed study continues in the hands of scientists who work with data from ground and space observatories.

The development of life on planet Earth is largely due to the power source representing the sun. This type of energy is called precisely solar, or also radiant. Thus, vegetables use the solar energy for the process in which they transform the inorganic matter in their environment into organic matter, a process called photosynthesis, being able by this means to grow; From this point on, they serve as a source of energy for the animals that consume them, continuing the chain of life, in which the human being is also favored.

Furthermore, the Sun is also an agent in the form of radiation heat transfer, and in this sense it is also part of the Kinetic energy, originated by velocity of the movement of the particles, which is known as heat. In radiation, a body (the Sun, in this case) transmits heat to another body through wave radiation, which can have the effect of temperature variation and state variation. For example, if we put a coin under the Sun, it will have increased its temperature after a certain period of time.

Regarding the variation of state, the most significant example is the effect that the Sun causes in contact with water. Take, for example, a puddle of water on the corner of a street, caused by the action of the Sun after a few days (or perhaps a few hours, depending on the intensity of the latter) the water in the puddle will have evaporated, forming bodies that are the clouds. Due to the action of heat transfer from the Sun to the water, it changes its state: from liquid to gaseous.