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en.wikipedia.org/wiki/Red_giant

A red giant is a luminous giant star of low or intermediate mass (roughly 0.3–8 solar masses ... They have radii tens to hundreds of times larger than that of the Sun. ... When the star exhausts the hydrogen fuel in its core, nuclear reactions can ... it is massive enough to become a red giant but does not have enough mass to ...

en.wikipedia.org/wiki/Stellar_evolution

Stellar evolution is the process by which a star changes over the course of time. Depending on the mass of the star, its lifetime can range from a few million .... Slightly more massive stars do expand into red giants, but their helium cores are not ... When a star exhausts the hydrogen in its core, it leaves the main sequence and ...

www.reference.com/science/star-grow-larger-after-exhausts-its-core-hydrogen-a0497a2786f82351

The reason that stars swell in size after exhausting their hydrogen cores is that the stars begin fusing helium, according to the University of Michigan. The helium  ...

web.njit.edu/~gary/202/Lecture19.html

The steps build a larger and larger nucleus, starting with carbon, then to ... four protons into a helium nucleus, just as the proton-proton chain does, but faster. ... During this stage, the star is burning hydrogen to helium in its core, and so it is .... Long after a supernova has occurred, the blasted layers of the star appear as a ...

map.gsfc.nasa.gov/universe/rel_stars.html

Apr 16, 2010 ... After a low mass star like the Sun exhausts the supply of hydrogen in its ... Hydrogen burning continues in a shell around the core and the star evolves into a red giant. When the Sun becomes a red giant, its atmosphere will envelope the ... If the progenitor mass is larger, then the resultant core is so heavy ...

staff.on.br/jlkm/astron2e/AT_MEDIA/CH20/CHAP20AT.HTM

After reaching the main sequence, a newborn star is destined to change very little in .... region becomes larger and more hydrogen-deficient as the star continues to shine. ... Figure 20.3 As a star's core loses more and more of its hydrogen, the ... The star continues to brighten and grow as it ascends the red-giant branch to ...

relativity.liu.edu/steve/teaching/spring09/Chapt13_lecture.pdf

Gravity holds a star together while the pressure of its ... produced in its core by the conversion of hydrogen ... shrink and grow hotter as the ... After one billion years, the red ... once again transform into a red giant, but only bigger .... When a main-sequence star exhausts its fuel, the core drops .... Massive stars do not stop.

astro.swarthmore.edu/astro1/reading/Bennett_Ch17_pt1.pdf

I How does a star's mass affect nuclear fusion? 17.2 LIFE AS A ... between pressure and gravity then grows increasingly more dramatic, with a final ... However, stars of greater mass release larger amounts of gravitational p0ten- ..... After a low—mass star exhausts its core hydrogen, hydrogen shell burning causes it to grow ...

geology.cpp.edu/janourse/CosmicPerspectiveXtraChapters/AWL_Bennett_Ch17.pdf

How do high-mass stars produce elements heavier than carbon? ... core, the strength of gravity grows. ..... larger and brighter after it exhausts its core hydrogen.

www.proprofs.com/quiz-school/story.php?title=astronomy-chapter-twelve

Molecular clouds do not have enough material to form such massive stars. B. They would ... Why does a star grow larger after it exhausts its core hydrogen? A.