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When does the main sequence star phase of a star end?
The "main sequence" is the region (on the HR diagram) for stars which burn hydrogen-1. Once stars use up most of their hydrogen-1 (and have significant amounts of helium-4), they leave the main sequence.
When a low mass star first runs short of hydrogen in its core it becomes brighter because?
Low mass stars become brighter after depleting hydrogen because all of the hydrogen in the core has been fused into helium. Once this happens, hydrogen fusion begins in the outer layers, which causes more heat and light generation.
How long until a neutron star destroys earth?
This will probably never happen. Earth will most likely be destroyed in about 5 billion years when the sun runs out of hydrogen in its core and expands.
Does nuclear fusion occurs as stars cool down?
The star will continue to fuse hydrogen until it runs out of resources and dies out, after which it will collapse and die.
Is it true stars are continually forming in the halo of your galaxy today?
Yes, mostly. When a star reaches the end of its "Main Sequence" and runs out of the main fuel hydrogen, it starts to burn Helium, and swell up to a Red Giant, or a Super Red Giant in some cases. When it runs out of Helium and Hydrogen, it collapses itself under its own force of gravity with no gas pressure to defend against its collapse. As it collapses... Large stars create Supernova explosions or sometime Black Holes Medium sized and small stars throw off their outer layers and the core cools to become a white dwarf. Anyways, the way stars form is from nebula gathering under a force of gravity so essentially new stars form from the nebula that older stars shed off in their death.
When a sun like stars hydrogen runs out at first it expands into?
A Red GIant.
The energy source of stars is primarily associated with?
hydrogen fusion in the core. eventually runs out of hydrogen in the core and hydrogen fusion moves to the shell whilst the core contracts (star expands into red giant)...star leaves the main sequence.
Can stars collide with earth?
No, they cannot. All stars but the Sun are light-years away. A light-year is about 10 trillion miles. The only chance of us colliding with a star is 5 billion years into the future, when the Sun runs out of hydrogen and expands.
The what of atoms powers the sun and other stars?
The sun and other stars are powered by fusing hydrogen into helium in their first stage of life. Then as they get older the hydrogen runs out and the fuse helium and on up onto iron. Heavier elements come from novas and super novas.
What is the fuel for stars?
Fusion, 2 hydrogen atoms turning into one Helium atoms continuously. (until the hydrogen runs 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 the fuel that runs fusion in stars?
Initially it is hydrogen. When that is spent, stars move to fusion of helium. There are also other fusion processes which take place: which process depends on the stars' mass.
What is the fuel the runs fusion in stars?
Initially it is hydrogen. When that is spent, stars move to fusion of helium. There are also other fusion processes which take place: which process depends on the stars' mass.
When does the main sequence star phase of a star end?
The "main sequence" is the region (on the HR diagram) for stars which burn hydrogen-1. Once stars use up most of their hydrogen-1 (and have significant amounts of helium-4), they leave the main sequence.
When a low mass star first runs short of hydrogen in its core it becomes brighter because?
Low mass stars become brighter after depleting hydrogen because all of the hydrogen in the core has been fused into helium. Once this happens, hydrogen fusion begins in the outer layers, which causes more heat and light generation.
How long until a neutron star destroys earth?
This will probably never happen. Earth will most likely be destroyed in about 5 billion years when the sun runs out of hydrogen in its core and expands.
The death of a star occurs when?
When the star runs out of fuel. Most stars burn (fuse, actually) hydrogen. When this runs out, what happens next depends on the mass of the star... heavier stars can fuse heavier elements for a short time, but lower mass stars simply collapse into white dwarfs.
