Looking at the star at night and the sun during the day, one could hardly believe it was the same type of celestial body. The sun is a star, the closest star to earth. It can be said that the life of all things on earth depends closely on the sun. Without the heat of the sun, life cannot arise. But even if it arises, it cannot exist. Without sunlight, we can do nothing with plants. If there were no plants, what would humans and animals eat? The sun is about 149,500,000 km away from earth. The solar volume is 1.3 million times the volume of the earth.
Interestingly, the sun is just a giant mass and not a solid body like the earth. How can you be sure that the sun is just a mass of air? The surface temperature of the sun is about 6.5000C. This temperature is not only enough to melt but also vaporize any metal or any stone. So the sun as a mass of air is not an arbitrary assertion.
In the old days, scientists thought that the sun shines heat due to the burning of something material. But it was not that the sun was shining and radiating just a few million years ago, but it was hundreds of millions of years ago. So where is the material stored in that it can be burned and burned? Scientists today believe that the sun’s heat and rays result from a process similar to the one that happens when the atomic bomb is detonated, that is, the process that matter turns into energy.
This transformation is different from burning. Burning is a matter from one form to another. For example, firewood turns to ash. But when the matter turns into energy, only a little can be turned into enormous energy. One ounce (28.35 grams) of matter can generate enough energy to melt a million tons of rock.
So, if this assumption is correct, the sun usually radiates and radiates heat ever since but has not lost much of its mass. It is estimated that using less than one percent of its mass, and the sun can continuously glow and radiate heat for 150 billion years.