Our entire universe revolves around a single star. The radius of the Sun determines its power and weight, and, accordingly, the force of attraction that it has. The structure of the Sun is no different from any other star of the same class. There are thousands of stars like it, even in our galaxy. But it gives us warmth, light and life.
The Sun was formed, like any other star, from a cloud of hydrogen that was in space. Hydrogen began to collect in the middle of the cloud and, under the influence of gravity, heats up from friction until the thermonuclear reactor, which is the Sun, starts up. The young star also pulled the hydrogen that was in the surrounding space, and planets and other cosmic bodies formed from heavier elements . This is how the history of the origin of the solar system looks briefly. It is worth noting that the Earth owes its birth to a supernova, which gave heavy elements to the formation of planets. This is still a young star (by astronomical standards), the age of the Sun is only 4.5 billion years. And this means that our star will warm us for a long time.
Since in essence this celestial body is a thermonuclear reactor, its dimensions affect the fuel reserves it has. That is, the radius of the Sun determines the duration of its life. But do not worry, because, according to the most conservative estimates, there will be enough hydrogen reserves for another 6 billion years, and after that the heavenly body will begin to burn helium, which will last for several billion more years. And during this time, humanity will either master other stellar systems or figure out how to extend the life of its star.
Now many people are interested in studying the Sun, since it is an inexhaustible source of energy, in contrast to traditional sources such as coal and oil. Scientists are also interested in the thermonuclear reaction itself, which occurs inside the Sun. Indeed, unlike nuclear energy, this star receives its energy from the creation of new atoms, and not from decay. The possibility of obtaining such energy in terrestrial conditions could solve many problems, including the problem of environmental pollution.
The stars keep their secrets well, and the thermonuclear reaction remains only a dream. The Daylight, which looks small in the sky, continues to warm us. After all, the radius of the Sun is 109 times larger than the radius of the Earth, and hundreds of bodies such as our planet can fit inside it. But the main firebox, due to which the celestial body shines, is slightly larger than the Earth in size, all the rest is the fuel reserves that the star holds thanks to gravity.
Scientists cannot accurately calculate the radius of the Sun, since it does not have the exact shape of a ball, and measurements in different places can give different results.
But for the average person this does not really matter. Because more joy than just seeing the sunlight in the morning is not necessary. This is confirmed by the fact that almost all earthly religions are descended from sun worshipers. Even our ancestors knew that the Sun is the main source of life.