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Why would an older main sequence star composed of a higher percentage of helium than a young main-sequence star?
Wiki User
∙ 6y ago
Im no astrophysicist but an older star would consume more of its hydrogen over time in comparison to helium through its fusion process. Over time concetrations would change resulting in a higher helium to hydrogen ratio.
Osvaldo Runte
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The sun is composed of what?
mostly hydrogen and helium
Gas giants have atmospheres composed primarily of helium and?
HydrogenAnswered By Nick Branham
What are the gases burned by stars?
Stars fuse hydrogen into helium during the main sequence. After the main sequence, helium, oxygen, silicon and carbon are fused.
The sun is composed mostly of what?
hydrogen and helium plasmas. This is really helpful
What percentage of helium is in the sun?
25%
What old-main-sequence star will be composed of a higher percentage of helium than a young main-sequene star?
All of them, that's how a star gets to be "old" ... it converts its hydrogen into helium.
Why would an older main sequense star be composed of a higher percentage of helium than a young main sequence star?
A star's nuclear fusion reaction converts hydrogen into helium, and generates energy through this process. A "new" star has a fairly low percentage of helium, but over the course of billions of years, it fuses the hydrogen "fuel" into helium "ash".
What percentage of the Sun is composed of helium?
The sun in composed of 25 percent helium. The other 75 percent is hydrogen. The sun also has small amounts of other elements such as neon, oxygen, carbon, and magnesium.
What is helium composed of?
Helium atoms.
The sun is composed of what?
mostly hydrogen and helium
Uranus' atmosphere is composed of what?
Helium.
How did cecilia payne help society?
Cecilia Payne discovered that stars in the main sequence of development are composed almost entirely of the elements hydrogen and helium, which contradicted the current beliefs of the time.
Gas giants have atmospheres composed primarily of helium and?
HydrogenAnswered By Nick Branham
What are the gases burned by stars?
Stars fuse hydrogen into helium during the main sequence. After the main sequence, helium, oxygen, silicon and carbon are fused.
Which planet is composed of gases?
Jupiter is composed mainly of gases (hydrogen and helium).
Why is an old main -sequence star have a higher percentage helium then a young main - sequence star?
Most stars - and specifically main-sequence stars - get their energy from converting hydrogen-1 to helium-4, so you would expect that the percentage of hydrogen will decrease over time, while the percentage of helium would increase over time. Please note that the rate of fusion depends a LOT on the mass of the star; so you might have a very massive star that's only a few million years old and has already burned up most of its fuel (hydrogen), and another star, a red dwarf, that's 10 billion years old and has only used a small percentage of its fuel.
What percentage of Uranus is water?
There is no Oxygen on Uranus. Uranus is primarily composed of Hydrogen and Helium
