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About how many years does it take for a star to run out of its fuel hydrogen?
It typically takes around 10 billion years for a star like the sun to consume all its hydrogen fuel and enter a different phase of its life cycle. The exact duration can vary depending on the size and type of the star.
Why don't they see hydrogen Balmer lines in the spectra of stars with temperatures of 3200 K?
These stars are so cool that nearly all of the hydrogen atoms are in the ground state. The visible-light Balmer absorption lines of hydrogen are produced by electrons moving from the 1st excited state to a higher orbit. However in M class stars most of the hydrogen is in the ground state, and absorption from the the ground state occurs at ultraviolet wavelengths.
What is a hydrogen cloud?
A hydrogen cloud is a region in space where a significant amount of hydrogen gas is present. These clouds typically exist in interstellar space and are important for the formation of stars and galaxies. The hydrogen gas in these clouds can be ionized, which makes them visible in certain wavelengths, such as in the H-alpha emission line.
Who created hydrogen?
Hydrogen was created during the early moments of the universe's existence through the process of nucleosynthesis, where protons and neutrons combined to form hydrogen atoms. It is the most abundant element in the universe and serves as the building block for stars and galaxies.
What astrophysicist first advanced the idea that the chemical elements originated from hydrogen in stars?
Fred Hoyle is credited with advancing the idea that the chemical elements originate from hydrogen in stars. He proposed the concept in his groundbreaking work on stellar nucleosynthesis.
What type of stars are red giants?
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.
Why do stars not become red giants?
Most medium mass stars such as our Sun DO become red giants. Smaller stars do not have enough mass to initiate helium fusion when the hydrogen supply begins to run low, and do not become red giants.
What kind of stars form red giants?
when Dwarf Stars run out of hydrogen they form Red Giant stars, then from that they become White dwarf stars when the outer layers shed, forming a planetary nebula.when giant stars or supergiant stars run out of hydrogen they form red supergiant stars
When does hydrogen-helium fusion and helium-carbon fusion occur in stars like our sun?
When hydrogen stocks run out
What stars have left the main sequence?
The main sequence stars are stars that fuse hydrogen, so the stars that have left the main sequence are the ones that have basically run out of hydrogen. They are the Red Giant stars, Supergiant stars and White Dwarf stars.
What is a star called that has exausted its supply of oxygen?
Stars are powered by fusing hydrogen, not oxygen. A star that has exhausted the hydrogen in its core may continue to burn as a red giant.
The star begins to run out of fuel and expands Into a red giant or red super giant?
No. That is when stars run out of hydrogen. They then have helium for fuel.
What Stars burn hydrogen?
All stars 'burn' hydrogen
Do all-stars die?
Yes, The star will stop the process of nuclear fusion and run out of hydrogen and die
Can a star get larger?
Yes. Most stars will expand to many times their original size when they run out of hydrogen in their cores.
What is the reason that all stars eventually die or stop burning?
They run out of hydrogen and other fuels for nuclear fusion
Does hydrogen make stars?
Hydrogen is certainly the main component of most stars.
