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Stellar evolution

en.wikipedia.org/wiki/Stellar_evolution

Stellar evolution is the process by which a star changes during its lifetime. Depending on the ... This process causes the star to gradually grow in size, passing through the subgiant stage until it...

How Does a Star Die? - Universe Today

www.universetoday.com/24186/how-does-a-star-die/

Secondly, and more commonly, the core of the star can still be surrounded by some layers of hydrogen, which continue to fuse and cause the star to expand, ...

What causes a star to die - Answers.com

www.answers.com/Q/What_causes_a_star_to_die

an average star spends 90 percent of its life as a hydrogen-burning, main- sequencestar. Once the hydrogen fuel in the star's core is depleted, it evolves rapidly ...

What happens when stars run out of fuel? | Discovery Kids

discoverykids.com/articles/what-happens-when-stars-run-out-of-fuel/

How do stars die? ... This is what happens when a normal-sized star dies. ... The star's gravity causes it to collapse, and then it explodes into a supernova. What's  ...

Why Do Stars Burn and What Happens When They Die? - Physics

physics.about.com/od/astronomy/f/LifeDeathStar.htm

What happens when a star dies? ... How does a star die? ... to helium, and to some heavier elements, it takes more and more heat to cause the nuclear fusion.

What happens to a star when it dies? | Reference.com

www.reference.com/science/happens-star-dies-6e6fc70569de570b

This causes them to be bright in the sky and burn hot. Eventually, stars run out of hydrogen and the star begins to die. When this happens, the helium begins ...

Stars - NASA Science

science.nasa.gov/astrophysics/focus-areas/how-do-stars-form-and-evolve/

Apr 15, 2016 ... These variations cause the star to pulsate and throw off its outer layers, ... Main sequence stars over eight solar masses are destined to die in a ...

What causes the death of a star? - Quora

www.quora.com/What-causes-the-death-of-a-star

Stars with mass less than or equal to the mass of our Sun usually "die" a peaceful death. By peaceful I mean that when they have burned all of their hydrogen ...

Red Giant Stars: Facts, Definition & the Future of the Sun - Space.com

www.space.com/22471-red-giant-stars.html

Aug 21, 2013 ... A red giant star is a dying star in the last stages of stellar evolution. ... The energy produced by the helium fusion causes the star to expand outward to many times its ... How the Sun Will Die: And What Happens to Earth.

Main Sequence Stars: Definition & Life Cycle - Space.com

www.space.com/22437-main-sequence-stars.html

May 5, 2015 ... Main sequence stars are stars that are fusing hydrogen atoms to form helium ... with the inward pressure caused by gravity, stabilizing the star.

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The Death of a Star - How Stars Work | HowStuffWorks

science.howstuffworks.com

... looking at? Learn what stars are and how they live and die! ... At some point after this, the core will become hot enough to cause the helium to fuse into carbon.

what causes a star to die – Space Zone

spacen14.imascientist.org.uk

Nov 19, 2014 ... Its basically when the star runs out of fuel to keep it going. If we take a star like our sun then: The star burn hydrogen, by nuclear fusion to ...

ESA - Space for Kids - Our Universe - Star death

www.esa.int

Most stars take millions of years to die. When a star like the Sun has burned all of its hydrogen fuel, it expands to become a red giant. This may be millions of ...