As the processes in the sun are nuclear reactions, rather than combustion that needs oxygen to sustain, the amount of oxygen needed is zero.

Hi! Thank you for your valuable message. Have a nice day

That's right, and as an aside, the rate of loss of mass, due to conversion into energy, is an impressive ~ 4.5 x 10⁹ kg/sec.

Cheers.........Codey

Hi Codey, if its true, when will be the sun becomes Zero mass. Cheers........Shanky

Never, though its long-term future isn't bright. After gorging itself for about another billion years or so it will begin to grow brighter and expand. At some point after that it becomes a red giant, swallowing up the barren remains of the three innermost planets and then contracts to become a white dwarf.

Nice reply Thanks

The mass of the sun is 2 x 10³⁰ kg, so dividing that by 4.5 x 10⁹ comes to over 10¹³ years. Current age is about 10¹⁰ years, so a way to go! But in practice it will not last anywhere near that long. Another 10¹⁰ years would be good going. I believe theory says it will expand to a red giant in ~ 10⁹ years, destroying life on Earth in the process.

But it will see you and me out!

BTW, if you want to check the 4.5 x 10⁹ kg/sec, energy received at Earth is 1.4 kW/m², so if you x that by the area of a sphere of radius = Earth's distance, gives total power.

Cheers........Codey

zero. the sun is not burning, it is fusing. there is no combustion on the sun. hydrogen atoms are fusing to become helium.

Jeez -and I thought solar power was green, but it turns out to be nuclear. Now what are we going to do with all that radioactive helium?