What is the significance of the neutrino from the point of view of astrophysics? Detailed answer

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What is the significance of the neutrino from the point of view of astrophysics? Detailed answer

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What is the significance of the neutrino from the point of view of astrophysics?

Neutrinos are elementary particles that do not have an electric charge.

In 1931, the Swiss physicist Wolfgang Pauli suggested their existence, and it was experimentally proven in 1956. For a long time it was believed that neutrinos have a zero rest mass, but the results of recent studies have shown that the neutrino mass, apparently, is non-zero, although very small (less than 1/25 of the mass of an electron).

From the point of view of astrophysics, neutrinos are of great importance. They appear in large numbers during nuclear reactions in stars, and therefore represent a unique ultra-fast type of "transport" capable of conveying direct information from the core of the Sun to the Earth. Neutrinos are always produced during a supernova explosion.

In cosmology, it is believed that entire sections of dark matter can consist of neutrinos (if their mass is not equal to zero).

From the Earth, only those neutrinos that are formed in the Sun can be detected. The only other source of neutrinos discovered was during the explosion of supernova 1987A in the Large Magellanic Cloud.

Author: Kondrashov A.P.

Random interesting fact from the Great Encyclopedia:

Why is the lion called the king of beasts?

The lion has always been considered the personification of strength. We often say: "strong as a lion" or "lion's heart". In royal courts around the world, the lion was used on shields and banners as a symbol of power.

Perhaps this happened not because the lion can defeat any animal, but because he inspired fear and horror in people and animals.

The ancient Egyptians considered the lion a sacred animal, and at the time Jesus Christ was born, the lion lived in many parts of Europe. But by the year 500, however, they were all exterminated. Now lions are found only in Africa and parts of India.

The lion belongs to the cat family. The average length of an adult animal is about 3 meters, and the weight is from 180 to 225 kilograms. Males are larger than females. Hunters say they track the male or female by the size of their tracks. The male has larger forelegs than the female.

The lion makes a roar or growl. Unlike other cats, he does not purr and rarely climbs trees, is not afraid of water.

Lions prey on grazing animals, so they live in more or less open spaces, and not in forests. And since lions must drink at least once a day, they usually live close to bodies of water.

The lion sleeps during the day and hunts at night. He can live alone, or in a pair, or in a group of four to ten individuals. Lions mainly feed on zebras, gazelles and antelopes. Sometimes they attack giraffes, but never touch elephants, rhinos and hippos. When a lion is not hungry, he does not pay attention to other animals.

During the hunt, the lion can sit in ambush or crawl up to the victim, and then make a sudden jump. During this throw, he develops a speed of up to 64 km / h!

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