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a high mass star — more than 3 times the mass of our Sun ... Neutron Stars are ultra compact, having about the mass of our Sun packed into 6 km.
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www.valdosta.edu/~cbarnbau/astro_demos/stellar_evol/evo...
www.valdosta.edu/~cbarnbau/astro_demos/stellar_evol/evol_3.html
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Sun-like stars are unable to burn beyond the helium stage, however, high mass stars are capable of burning carbon and oxygen and beyond, depending upon their mass. In many cases the star will reach a point where silicon undergoes nuclear fusion being converted into iron.
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wind.cc.whecn.edu/~marquard/astronomy/highmass.htm
wind.cc.whecn.edu/~marquard/astronomy/highmass.htm
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It is important to state that while the fusing of hydrogen to helium is being performed in both low and high mass stars, high mass stars primarily burn hydrogen through the CNO cycle (Carbon, Nitrogen, Oxygen).
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astronomyonline.org/Stars/HighMassEvolution.asp
astronomyonline.org/Stars/HighMassEvolution.asp
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Black holes are even more exotic objects than neutron stars. With all the mass concentrated at a point they have extremely high gravitational fields. They are referred to as black because not even light can escape from them once it has crossed a region known as the event horizon.
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outreach.atnf.csiro.au/education/senior/astrophysics/st...
outreach.atnf.csiro.au/education/senior/astrophysics/stellarevolution_deathhigh.html
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Structure of a high-mass star ... High-mass stars, on the other hand, experience a short but exciting life, which ends with a bang, not a whimper. The key is the core of the star and the nuclear reactions which occur therein. Let's take a look....
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spiff.rit.edu/classes/phys230/lectures/sn/sn.html
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So massive stars have higher temperatures in their cores. We also know that the reason we need high temperatures to get fusion is that positively charged nuclei will repel away from each other before they can fuse unless they're moving very fast.
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physics.ship.edu/~mrc/pfs/108/node6.htm
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1. The centers of high mass stars are capable of reaching much higher temperatures, thus can fuse much heavier elements than can low mass stars. So massive stars go through several nuclear burning stages beyond helium fusion, creating new, heavier elements at each stage.
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www.courses.psu.edu/astro/astro010_pjm25/starlifedeathI...
www.courses.psu.edu/astro/astro010_pjm25/starlifedeathII.html
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Star Death II: High Mass Stars (M > 8Msun) ... 2. Why can nuclei heavier than helium be fused in the cores of high-mass stars, whereas in the cores of low-mass stars fusion ceases with helium fusion? ... 1. The centers of high mass stars are capable of reaching much higher temperatures, thus can fuse much heavier elements...
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www.courses.psu.edu/astro/astro010_pjm25/stardeath2.htm...
www.courses.psu.edu/astro/astro010_pjm25/stardeath2.html
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Evolution of High-Mass Stars ... Remember that as the mass goes up, so does the central temperature as required to maintain hydrostatic equilibrium. This leads to two major differences between solar mass and more massive stars.
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www.ucolick.org/~bolte/AY4_00/week8/massive_stars.html
www.ucolick.org/~bolte/AY4_00/week8/massive_stars.html
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