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orbity
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of how a star is able to resist collapsing under its own gravitational attraction??
Resisting Collapse: The Physics Behind a Star's Stability
- Thread starter orbity
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In summary, a star is able to resist collapsing under its own gravitational attraction due to the pressure generated by Pauli's exclusion principle, also known as electron degeneracy pressure. This principle prevents two electrons from occupying the same quantum state, providing enough force to counteract the pull of gravity. However, if the star's mass exceeds the Chandrasekhar limit of 1.4 solar masses, the electron degeneracy pressure will not be enough and the star will collapse further into a neutron star or black hole. Further understanding on this topic can be found through resources such as a stellar evolution tutorial.
- #2
Chi Meson
Science Advisor
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I wonder if there might be anything going on inside the star, pushing out?
- #3
sid_galt
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nuclear fusion = high pressure, I think.
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berkeman
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I googled stellar evolution tutorial, and got some cool hits. This first one should help you out:
http://zebu.uoregon.edu/textbook/se.html
http://zebu.uoregon.edu/textbook/se.html
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Markjdb
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The pressure inside a white dwarf (a collapsed star) which remains in equiblirum with the gravitational attraction is the result of Pauli's exclusion principle, which states that two electrons cannot occupy the same quantum state at the same time. This principle gives rise to what is called electron degeneracy pressure and is what counteracts gravitational contraction. If the mass of the original star is greater than 1.4 solar masses (the Chandrasekhar limit), the electron degeneracy pressure will not be sufficient to counteract gravity, and the star will collapse further into either a neutron star or a black hole.
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orbity
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thanks for helping me to better understand 
FAQ: Resisting Collapse: The Physics Behind a Star's Stability
What is physical explanation?
Physical explanation is the process of using scientific principles and theories to understand and describe the physical world. It involves identifying the causes and effects of physical phenomena and explaining them in a logical and systematic manner.
How is physical explanation different from other forms of explanation?
Physical explanation is based on empirical evidence and follows the scientific method, which involves making observations, forming hypotheses, conducting experiments, and making conclusions. Other forms of explanation, such as religious or philosophical explanations, may be based on beliefs or personal experiences rather than scientific evidence.
What are the key elements of a good physical explanation?
A good physical explanation should be based on well-established scientific principles and supported by empirical evidence. It should also be logical, coherent, and consistent with other known facts and theories. Additionally, a good explanation should be able to make accurate predictions and be open to revision as new evidence is discovered.
Can physical explanations explain everything in the universe?
No, physical explanations have limitations and cannot explain everything in the universe. Some phenomena, such as consciousness or morality, may be beyond the scope of scientific understanding and require other forms of explanation.
How important is physical explanation in the scientific community?
Physical explanation is essential in the scientific community as it allows scientists to understand and describe the natural world, make predictions, and develop new technologies. It also helps to advance our knowledge and understanding of the universe and can lead to practical applications that benefit society.