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When does hydrogen first begin to fuse into helium in the star formation process?
Wiki User
∙ 13y ago
When the temperature of the core reaches 10 billion degrees kelvin
Wiki User
∙ 13y ago
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When does helium fusion begin in a star?
Hydrogen undergoes nuclear fusion to form helium at a temperature of 107 K
What heavier element is created when hydrogen atoms fuse together in the suns core?
Normal "main sequence" stars fuse hydrogen into helium during most of the star's life. The core of a star gets so hot that the hydrogen atoms begin to fuse together. As hydrogen only has 1 proton when if fuses with another hydrogen atom it has 2 protons so has become helium.
What is the planets atmosphere made out of?
The sun's "atmosphere" or corona is primarily composed of Hydrogen and some Helium. The Sun produces helium by the process of nuclear fusion in it's core. Meaning that it compresses hydrogen under great heat and pressure until the nucleus of two atoms combine to make Helium. This is what fuels the Sun. The heated hydrogen and helium rise to the surface of the sun where they give off their heat. This process will continue until the sun runs out of Hydrogen. Then it will begin to produce heavier elements like carbon.
Does fusion occur when hydrogen atoms join together?
Helium fusion is a process that happens as a part of what is called stellar nucleosynthesis. That's a term we apply to the mechanisms working within stars. Stars are fusion engines, and they are powered primarily by fusing the element hydrogen into the element helium (the first and second most abundant elements in the universe, respectively). This process sometimes goes under the name proton-proton reaction. As stars exhaust their hydrogen fuel and build up a lot of helium, they begin to fuse the helium together to form the element carbon in what is called the triple-alpha process. Links are provided to the relevant Wikipedia articles. Our friends there provide knowledge for free.
The sun is mainly composed of helium and what other element?
The Sun is, at present, about 90.1% hydrogen and 9.9% helium and a small mixture of heavy elements(iron, calcium,sodium).This changes slowly over time as the Sun converts hydrogen to helium in its core.
When does helium fusion begin in a star?
Hydrogen undergoes nuclear fusion to form helium at a temperature of 107 K
What are science words that begin with letter h?
Hydrogen, hafnium, helium, holmium and hassium are chemical elements.
How is a star able to begin helium fusion after it ran out of hydrogen?
The basic idea is that once a star runs out of hydrogen fuel, it starts contracting until it gets hot enough to fuse helium into heavier elements. This happens at temperatures that are quite a bit higher than the temperatures required to fuse hydrogen into helium.
Some scientific words that start with an H?
Halogen, Helium and hydrogen are science words. They begin with the letter H.
What heavier element is created when hydrogen atoms fuse together in the suns core?
Normal "main sequence" stars fuse hydrogen into helium during most of the star's life. The core of a star gets so hot that the hydrogen atoms begin to fuse together. As hydrogen only has 1 proton when if fuses with another hydrogen atom it has 2 protons so has become helium.
What is the planets atmosphere made out of?
The sun's "atmosphere" or corona is primarily composed of Hydrogen and some Helium. The Sun produces helium by the process of nuclear fusion in it's core. Meaning that it compresses hydrogen under great heat and pressure until the nucleus of two atoms combine to make Helium. This is what fuels the Sun. The heated hydrogen and helium rise to the surface of the sun where they give off their heat. This process will continue until the sun runs out of Hydrogen. Then it will begin to produce heavier elements like carbon.
Does fusion occur when hydrogen atoms join together?
Helium fusion is a process that happens as a part of what is called stellar nucleosynthesis. That's a term we apply to the mechanisms working within stars. Stars are fusion engines, and they are powered primarily by fusing the element hydrogen into the element helium (the first and second most abundant elements in the universe, respectively). This process sometimes goes under the name proton-proton reaction. As stars exhaust their hydrogen fuel and build up a lot of helium, they begin to fuse the helium together to form the element carbon in what is called the triple-alpha process. Links are provided to the relevant Wikipedia articles. Our friends there provide knowledge for free.
What triggers nuclear fusion stars?
Fusion in stars are usually the result of gravity.Once a mass of hydrogen accumulates enough mass, the gravity of all that mass compresses the core of the star to the point that the hydrogen atoms there begin fusing into helium. The process then cascades outward, and the end result is a star.
What gas makes up the majority of an old star?
Even in an old star just before it explodes, the majority of the star in hydrogen gas. But as the hydrogen is fused, the helium residue begins to interfere with the hydrogen fusion, like ashes in the bottom of a fireplace.
How does the amount of Hydrogen differ from that of helium in the Sun mass?
The Sun is about 70% hydrogen, 28% helium, and 2% "other". When the Sun gets to about 50% hydrogen, the amount of helium present will seriously interfere with the hydrogen fusion, and the Sun will begin to collapse under its own gravity. The Sun's core is currently around 15 million degrees Kelvin. As the Sun collapses, the increasing pressure will heat the Sun, and when it gets to about 45 million degrees, the Sun will begin fusing helium and with the new power source will expand into a red giant. We expect this to happen in about 4 billion years, perhaps a little more.
How do stars begin to shine?
After stars are created in nebulae with dust and gas, they can begin the process of fusing hydrogen to make helium. Voila!, one star coming up!
How many years does it take a star with mass of the sun to convert its hydrogen to its core?
No star will EVER convert ALL of the hydrogen to helium via nuclear fusion (the process that powers the star) because when the star is less than about 50% hydrogen, the helium gets in the way of the fusion reaction and the star begins to die out. The star will begin to shrink as the star's own gravity now is more powerful than the nuclear reaction, and the star will get more dense and will heat up. If the internal temperature and pressure gets high enough, the star will begin fusing helium into even heavier elements, becoming a red giant. The speed of this reaction depends on the original mass of the star.
