(1) When a star exhausts the hydrogen in its core, it becomes a giant or supergiant . Once a star has used up all the hydrogen in its core, fusion of hydrogen into helium stops. The core starts to contract again (just as it contracted as a protostar, before hydrogen fusion began).
What happens when a main sequence star exhausts its core hydrogen fuel supply what happens when a main sequence star exhausts its core hydrogen fuel supply?
What happens when a main-sequence star exhausts its core hydrogen fuel supply? The core shrinks while the rest of the star expands.
What happens when a star exhausts its core hydrogen supply?
Once a star exhausts its core hydrogen supply, the star becomes redder, larger, and more luminous: it becomes a red giant star . This relationship between mass and lifetime enables astronomers to put a lower limit on the age of the universe.
What happens when a main sequence star exhausts the fuel in its core it becomes a?
#3 when a star exhausts its core hydrogen fuel, the core contracts but the star as whole expands .
What happens when a main sequence star first runs out of hydrogen in its core?
As the main sequence star glows, hydrogen in its core is converted into helium by nuclear fusion . When the hydrogen supply in the core begins to run out, and the star is no longer generating heat by nuclear fusion, the core becomes unstable and contracts. ... All stars evolve the same way up to the red giant phase.
What happens to a star after it exhausts its core hydrogen quizlet?
When a star exhausts its core hydrogen fuel, the core contracts but the star as a whole expands .
When a star exhausts its hydrogen does it become?
(1) When a star exhausts the hydrogen in its core, it becomes a giant or supergiant . Once a star has used up all the hydrogen in its core, fusion of hydrogen into helium stops. The core starts to contract again (just as it contracted as a protostar, before hydrogen fusion began).
Which is the correct order for some stages in the life of a low mass star quizlet?
Which of the following lists the stages of life for a low-mass star in the correct order? protostar, main-sequence star, red giant, planetary nebula, white dwarf . the core shrinks while the rest of the star expands.
Which stage lasts the longest?
During interphase , the cell undergoes normal growth processes while also preparing for cell division. It is the longest phase of the cell cycle, cell spends approximately 90% of its time in this phase.
How long does a star stay in main sequence?
While the sun will spend about 10 billion years on the main sequence, a star 10 times as massive will stick around for only 20 million years . A red dwarf, which is half as massive as the sun, can last 80 to 100 billion years, which is far longer than the universe’s age of 13.8 billion years.
What happened to the core of a star after a planetary nebula occurs?
what happened to the core of a star after a planetary nebula occurs? glowing cloud of gas removed from a loss mass star at the end of its life . After, the exposed core will be hot and release ultraviolet radiation.
What happens to a star after hydrogen stops fusing in the core?
When the core hydrogen is used up and no more nuclear fusion occurs, the star’s outer stellar layers expand and the core shrinks . At this point, the star becomes a Subgiant Star . The star’s outer layers continue to expand and the star brightens. The star then becomes a Red Giant Star .
What will happen if a low massive main sequence star runs out?
When a main sequence star begins to run out of hydrogen fuel, the star becomes a red giant or a red super giant. THE DEATH OF A LOW OR MEDIUM MASS STAR After a low or medium mass or star has become a red giant the outer parts grow bigger and drift into space , forming a cloud of gas called a planetary nebula.
What happens in the first stage of a star much bigger than the sun’s death?
Stars More Massive Than the Sun
When the core runs out of hydrogen, these stars fuse helium into carbon just like the sun . However, after the helium is gone, their mass is enough to fuse carbon into heavier elements such as oxygen, neon, silicon, magnesium, sulfur and iron.
What is the heaviest element formed before a star dies out?
Our Sun is currently burning, or fusing, hydrogen to helium . This is the process that occurs during most of any star’s lifetime. After the hydrogen in the star’s core is exhausted, the star can fuse helium to form progressively heavier elements, carbon and oxygen and so on, until iron and nickel are formed.
What happens to a star after main sequence?
In general, the more massive a star is, the shorter its lifespan on the main sequence. After the hydrogen fuel at the core has been consumed, the star evolves away from the main sequence on the HR diagram, into a supergiant , red giant, or directly to a white dwarf.
