At this point in time hydrogen is being fused into helium. Many, many years down the line, as the hydrogen runs out, the sun will begin fusing heavier and heavier elements for fuel. At least to iron.
no combustion dose not fuel the sun but the sun is fueled by a nuclear reaction known as fusion.
The nuclear fuel of the sun is hydrogen. The Sun binds the hydrogen atoms into helium, which creates energy in the process.
The hydrogen in the Sun is fuel for the nuclear fusion reaction.
The Sun gets its energy from nuclear reactions; it has enough fuel to continue shining for a few billion years more.
Hydrogen-1, which is converted, through nuclear fusion, to helium-4.
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The fuel is not a regular chemical fuel, but hydrogen, which gets converted to helium through nuclear fusion, at very high temperatures.The fuel is not a regular chemical fuel, but hydrogen, which gets converted to helium through nuclear fusion, at very high temperatures.The fuel is not a regular chemical fuel, but hydrogen, which gets converted to helium through nuclear fusion, at very high temperatures.The fuel is not a regular chemical fuel, but hydrogen, which gets converted to helium through nuclear fusion, at very high temperatures.
All stars- including our sun- are an ongoing nuclear fusion reaction- hydrogen is fused into helium. The hydrogen is consumed in that reaction.
The Sun is estimated, based on its size and energy production, to be about 5 billion years old."The Solar System", Roman Smoluchowski, Scientific American Library, 1983, page 6
After a star like our Sun runs out of nuclear fuel, it will shed its outer layers and become a white dwarf. White dwarfs are created from low to medium mass stars (like the Sun) that have exhausted their nuclear fuel and undergone certain stages of stellar evolution.
Mostly hydrogen for a star like our sun in the solar system.
Yes. There would be no sunspots at all. But note that what was asked was "if the sun's nuclear fuel is exhausted and it no longer supported the release of nuclear energy". This would mean the sun was spent, or had died and was reduced to a white hot ball of material. There'd be no sunspots under those circumstances. Sunspots result from the fact that regions of the sun's surface can be at different temperatures. This has been seen in other stars, so we know sunspots occur in stars of different types and of different compositions. In the life of a star, when does it quit showing sunspots? Very, very late in life, and only for a short period until its end.