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Exhausting its hydrogen supply. Main Sequence stars fuse hydrogen to make helium. Eventually, they run out of fuel and then start to fuse helium to make carbon, nitrogen and oxygen, with slightly higher atomic numbers than helium,
The nucleo-chemistry of these reactions involves the generation of more energy and greater loss of mass than hydrogen fusion did which is why after 100 million years or so stars then leave the red giant phase and cool. shrink and turn into white dwarfs.
A red giant is a large non-main sequence star of stellar classification K or M; so-named because of the reddish appearance of the cooler giant stars.
THE SUN
The Sun is expected to become a red giant in about five billion years. It is calculated that the Sun will become sufficiently large to engulf the current orbits of some of the solar system's inner planets, including Earth.
However, the gravitational pull of the Sun will have weakened by then due to its loss of mass, and all planets but Mercury will escape to a wider orbit. That said, Earth's biosphere will be destroyed as the Sun gets brighter while its hydrogen supply becomes depleted.
The extra solar energy will cause the oceans to evaporate to space, causing Earth's atmosphere to become temporarily similar to that of Venus, before the atmosphere is also lost.
Nikko Gleichner
Wiki User
∙ 12y agoExhausting its hydrogen supply. Main Sequence stars fuse hydrogen to make helium. Eventually, they run out of fuel and then start to fuse helium to make carbon, nitrogen and oxygen, with slightly higher atomic numbers than helium,
The nucleo-chemistry of these reactions involves the generation of more energy and greater loss of mass than hydrogen fusion did which is why after 100 million years or so stars then leave the red giant phase and cool. shrink and turn into white dwarfs.
A red giant is a large non-main sequence star of stellar classification K or M; so-named because of the reddish appearance of the cooler giant stars.
THE SUN
The Sun is expected to become a red giant in about five billion years. It is calculated that the Sun will become sufficiently large to engulf the current orbits of some of the solar system's inner planets, including Earth.
However, the gravitational pull of the Sun will have weakened by then due to its loss of mass, and all planets but Mercury will escape to a wider orbit. That said, Earth's biosphere will be destroyed as the Sun gets brighter while its hydrogen supply becomes depleted.
The extra solar energy will cause the oceans to evaporate to space, causing Earth's atmosphere to become temporarily similar to that of Venus, before the atmosphere is also lost.
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What causes a red giant?
After a star burns up all it's hydrogen, it becomes a red giant.
What is a star called that has exhausted its supply of hydrogen?
A star that has exhausted the hydrogen in its core will become a red giant or supergiant.
When a main-sequence star has exhausted the fuel in its core it becomes a....?
I am pretty sure it becomes a giant if I'm not mistaken.
How can a red giant become brighter if it now has a lower surface temperature?
how can a red giant star become brighter if it now has a lower surface temp
What do medium stars in the red giant phase become?
A star that is in it's teenage years(medium star) isn't a red giant until it's last years.
What causes a star to become a super giant versus a giant?
That would mainly depend on the star's mass.
What causes a giant star to turn into a white dwarf?
A giant star would experience a supernova explosion, in order to become a white dwarf.
What causes a giant?
After a star burns up all it's hydrogen, it becomes a red giant.
What causes a red giant?
After a star burns up all it's hydrogen, it becomes a red giant.
What is a star called that has exhausted its supply of hydrogen?
A star that has exhausted the hydrogen in its core will become a red giant or supergiant.
How does a main sequence star becomes a giant?
it doesn't because the star may be already dead before its ready to become a giant.
What determines if a star will become a rea giant or a super giant?
A star's entire fate is tied into its initial mass. Nothing else matters.
When its fusion stops a star will become either a black hole a neutron star or?
When fusion stops in a star it will start to fuse helium and will become a red giant.
What will a star become as it uses up its hydrogen supply?
a super giant.
How many times can a star become a red giant?
Just once.
What kind of star the sun will become in the end of the cycle?
red giant
When a main-sequence star has exhausted the fuel in its core it becomes a....?
I am pretty sure it becomes a giant if I'm not mistaken.
