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Red giant.
The word "most" in the question isn't quite accurate. There is still a lot of hydrogen remaining in a star when the amount of helium becomes a problem. Hydrogen in the star is fused into helium, and the helium is at least roughly analogous to the ash in a wood fire; it is what's left over from the hydrogen fusion, and too much gets in the way.
When the proportion of helium gets too high - above about 50% is enough - the helium begins to interfere with the hydrogen fusion process. Without enough new heat generated by fusion, the star begins to collapse under the influence of gravity. The compression increases the temperature, and when the pressure and temperature gets high enough, the helium "ash" in the core becomes helium "fuel" for the Red Giant phase.
What else can I help you with?
Why are red giants so bright?
Red giants are bright because they have expanded to a larger size, allowing them to emit more light. They are in a later stage of their life cycle where they have exhausted their core hydrogen and are fusing helium and other elements in their cores, releasing a large amount of energy in the process.
What does the sun's core mostly consist of?
The Sun's core consists mostly of hydrogen and helium gas undergoing nuclear fusion reactions, specifically the fusion of hydrogen into helium. This process releases large amounts of energy, which sustains the Sun's brightness and heat.
What is the process that generates energy in the core of the main sequence star?
The process is nuclear fusion of hydrogen. All stars at their main sequence converts hydrogen to helium giving large energy by during hydrogen atoms into helium nucliiFusion of hydrogen.
Is a solar prominence a thermonuclear reaction?
No, a solar prominence is not a thermonuclear reaction. Solar prominences are large, bright features extending outward from the Sun's surface due to magnetic activity. Thermonuclear reactions, on the other hand, occur in the Sun's core where hydrogen atoms are fused into helium, releasing energy in the process.
Why do the sun shine bright?
The sun shines bright because it undergoes nuclear fusion in its core, converting hydrogen into helium and releasing energy in the form of light and heat. This process is what provides the sun with its brightness and sustains life on Earth.
Why are red giants so bright?
Red giants are bright because they have expanded to a larger size, allowing them to emit more light. They are in a later stage of their life cycle where they have exhausted their core hydrogen and are fusing helium and other elements in their cores, releasing a large amount of energy in the process.
What is below Saturn's atmosphere?
like Jupiter, Saturn has a large, rocky core at its center, about 10 times the size of earth.
What does the sun's core mostly consist of?
The Sun's core consists mostly of hydrogen and helium gas undergoing nuclear fusion reactions, specifically the fusion of hydrogen into helium. This process releases large amounts of energy, which sustains the Sun's brightness and heat.
What is the process that generates energy in the core of the main sequence star?
The process is nuclear fusion of hydrogen. All stars at their main sequence converts hydrogen to helium giving large energy by during hydrogen atoms into helium nucliiFusion of hydrogen.
Why is the density of Jupiter is greater than that of Saturn?
We do not know exactly why but we can surmise that Jupiter has a rather large rocky core and also, being so large, some of the hydrogen it is made form could be in a dense, metallic state near the core
Does the sun and the earth have a hydrogen core?
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.
Is a solar prominence a thermonuclear reaction?
No, a solar prominence is not a thermonuclear reaction. Solar prominences are large, bright features extending outward from the Sun's surface due to magnetic activity. Thermonuclear reactions, on the other hand, occur in the Sun's core where hydrogen atoms are fused into helium, releasing energy in the process.
Why do the sun shine bright?
The sun shines bright because it undergoes nuclear fusion in its core, converting hydrogen into helium and releasing energy in the form of light and heat. This process is what provides the sun with its brightness and sustains life on Earth.
How many core electrons In hydrogen?
Hydrogen has one core electron. Core electrons are those in the inner energy levels of an atom and are not involved in chemical bonding.
Where does hydrogen fusion occur when there is no hydrogen left in the core of a star?
If there is no hydrogen left at the core of star then hydrogen fusion cannot occur. What happens in the core of a star before that happens is that helium begins to fuse, and then the other elements going up the periodic table until carbon. And then if the star explodes into a supernova, traces of the higher elements are fused as well.
What is generated in the suns core?
Helium is generated in the core of our sun by nuclear synthesis .During the nuclear fusion inside the sun , hydrogen is fused into helium .the main products generated in this reaction are - Gamma ray photon, positron, neutrino, isotopes of hydrogen and helium and large amount of energy .
Is there hydrogen on io?
The interior of IO consist mainly of iron in the core and silicate rock forming the crust. On the surface sulphur dixoide ice is noted. The atmosphere is very thin and is also made of suphur dixoide.The planet does not have large amounts of hydrogen like Jupiter (which is almost entirely hydrogen) or even earth which has large amounts of hydrogen (in water: H2O)
