What Determines the Evolutionary Path of Stars?

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A star is a massive celestial body composed primarily of hydrogen and helium that undergoes nuclear fusion to produce energy. Astronomers differentiate stellar objects based on their spectral characteristics, luminosity, and temperature. The energy that powers a star comes from nuclear fusion in its core, converting hydrogen into helium. The evolutionary path of a star involves several stages, including formation, main sequence, and eventual death, which varies based on the star's mass. Stars move through this cycle due to gravitational forces and nuclear processes, with the evolutionary path differing significantly for low-mass versus high-mass stars.
nath_quam
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Hey, would anyone be able to tell me quality websites/ or help to answer the following questions:
1. What is a star?
2. How Astronomers can tell the difference between different stellar objects?
3. What powers a star?
4. The evelotionary path of a star and it's different stages.
5. Why Stars move though this evolutionary cycle and why the cycle is altered for stars of different mass?

Thanks for your help Nath
 
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There's lots of good websites, nath. Do a google search on "Stellar Evolution" and you see things like this from Nasa.

http://observe.arc.nasa.gov/nasa/space/stellardeath/stellardeath_intro.html
 
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