According to the accepted astronomical classification, our Sun belongs to the stellar class “yellow dwarfs”: the mass of these astronomical objects is from 0.8 to 1.2 solar masses, and the surface temperature is 5000–6000 degrees Kelvin. It seems that they are not so astronomical... and yet our native yellow dwarf “lights up”...

The sun evaporates a billion tons of water on Earth in one minute. Each gram of water vapor carries away 537 cal (2265 J) of solar energy. And the amount of it that reaches the Earth's surface every 72 hours is equivalent to all the energy concentrated in the world's reserves of coal, oil and natural gas.