Hydrogen is the original fuel that keeps a star "burning" by nuclear fusion.
No hydrogen and the star will die unless it can start use helium to produce energy.
The small mass "red dwarf" stars can't use helium, but more massive stars can.
hydrogen fusion in the core. eventually runs out of hydrogen in the core and hydrogen fusion moves to the shell whilst the core contracts (star expands into red giant)...star leaves the main sequence.
No known planet has a core of metallic hydrogen, but Jupiter and Saturn have layers of liquid metallic hydrogen surrounding their cores.
These are stars that have exhausted their core's supply of hydrogen by switching to a thermonuclear fusion made of hydrogen in a shell that surrounds the core.
at or near the core
In the core of a sun hydrogen nuclei are fused into helium atoms, liberating energy.
There's hydrogen at the core of the sun - that's the sun's main fuel - but earth's core is mostly iron and nickel.
helium and hydrogen
hydrogen fusion in the core. eventually runs out of hydrogen in the core and hydrogen fusion moves to the shell whilst the core contracts (star expands into red giant)...star leaves the main sequence.
No, it has a dense rocky core in the middle!!
Nuclear Fusion from hydrogen in it core and helium
No. Hydrogen fusion occurs in the star's core.
When hydrogen is fused in the suns core Helium is produced.
hydrogen
A star's core consists mostly of hydrogen. As the star ages, the amount of helium, carbon and other elements in the core increases as they are the result "ash" resulting from the consumption of the hydrogen fuel.
A red giant forms when a star runs out of hydrogen fuel at its core and starts fusing hydrogen in a shell around the core the core. This causes the star to expand and cool.
No known planet has a core of metallic hydrogen, but Jupiter and Saturn have layers of liquid metallic hydrogen surrounding their cores.
These are stars that have exhausted their core's supply of hydrogen by switching to a thermonuclear fusion made of hydrogen in a shell that surrounds the core.