The sun loses 4, 000, 000 tons of mass per second - this is such a small interesting fact. According to Einstein, the energy of a physical object is equivalent to its mass (E = mc2). Based on this, you can calculate how much mass the Sun loses due to the fact that it emits light, that is, energy: 4 million tons per second. But this is very little, given its size and weight: at this rate, our star gets rid of only 1% of its mass in 160, 000, 000, 000 years. Solar winds, forcing the Sun's material to overcome its gravity and fly into outer space, in fact, pose a much greater danger in terms of the destruction of the star.