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When a main sequence star runs out of hydrogen t fuel the core which type of star begins t from?
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Why does the main sequence star end?
A "main-sequence star" is one that fuses hydrogen into helium. Eventually, the star will run out of this specific type of fuel - in other words, it won't have enough hydrogen (at least, near its core) to continue this process.
Just as a low-mass main sequence star runs out of fuel in its core it actually becomes brighter How is this possible?
The core contracts, raising the temperature and increasing the size of the region of hydrogen shell-burning.
What is the primary fuel of main sequence stars?
The primary fuel for all stars is hydrogen
Are main sequence stars older than red giants?
No, red giants are generally older than main sequence stars, as red giants have no hydrogen left for fuel, and burn helium instead. where as Main Sequence stars burn hydrogen for fuel.
What is the name for the portion of a star's life cycle when it is using hydrogen for fuel?
main sequence
When a main sequence star runs out of hydrogen to fuel the core of which type of star begins to form?
red giant
Why does the main sequence star end?
A "main-sequence star" is one that fuses hydrogen into helium. Eventually, the star will run out of this specific type of fuel - in other words, it won't have enough hydrogen (at least, near its core) to continue this process.
Why is a 1 solar mass giant more luminous than a 1 solar mass main sequence star?
When a star exhausts the hydrogen fuel in its core, nuclear reactions in the core stop, so the core begins to contract due to its gravity. This heats a shell just outside the core, where hydrogen remainsinitiating fusion of hydrogen to helium in the shell. The higher temperatures lead to increasing reaction rates, producing enough energy to increase the star's luminosity by a factor of 1,000-10,000.
Does A star stays in the main sequence stage until all of its helium is used up?
No, and it is its hydrogen, not helium, that is used up. Hydrogen is fused together to make helium, an inert gas. Helium cannot burn, which is why we use it to fill balloons and not hydrogen. The explosion of the Hindenburg taught us painfully not to use the volatile gas hydrogen in such conditions. When a star begins to run low on hydrogen, it begins to collapse on itself, burning fuel in the core at a greatly reduced rate. It still has fuel to burn, but it is running low. This superheated core forces the outer atmosphere of the star to expand outward, forming a red giant or supergiant, and that is when the star leaves the Main Sequence. The core still burns, and depending on the mass of the star, the outer envelope will either puff outward in a planetary nebula, leaving a white dwarf behind, or it will explode as a supernova, leaving behind a neutron star or a black hole, depending on the mass of the core.
Just as a low-mass main sequence star runs out of fuel in its core it actually becomes brighter How is this possible?
The core contracts, raising the temperature and increasing the size of the region of hydrogen shell-burning.
Balance is lost when core hydrogen fuel is?
depleted.
What is the primary fuel of main sequence stars?
The primary fuel for all stars is hydrogen
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.
Are main sequence stars older than red giants?
No, red giants are generally older than main sequence stars, as red giants have no hydrogen left for fuel, and burn helium instead. where as Main Sequence stars burn hydrogen for fuel.
What is in a star's core?
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.
How is the red-giant formed?
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.
What is the name for the portion of a star's life cycle when it is using hydrogen for fuel?
main sequence
