About 4.5 billion years ago due to the collapse of a hydrogen molecular cloud, the Sun was formed. The solar formation was created in two unique ways, by using computer models based on Stellar Evolution we can determine the age of the Sun. We also use the radiometric data for the oldest Solar System material.
In recent times the Sun is in the midway of its life cycle. This is the time when nuclear fusion reaction in the core of the operates steadily and the “Sun uses core fuse to turn hydrogen into helium.” It is measured that in “every second four million metric tons of matter are converted into energy in the core of the Sun.”
It is believed that in about “5 billion years the Sun will enter into a phase which will be called the Red Giant Phase.” It might be changed as a supernova, but the scientists say that the Sun does not have enough mass in it to change into that. After the Red Giant phase, the Sun will move to a phase that will cause intense thermal pulsations and it will make the outer layers of the Sun melt. It will form a planetary nebula. The outer layers will eject and the extremely hot core will cool off in a way. According to scientists, the stellar evolution scenario is considered as a low or medium mass star.