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shihab-kol
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I read in some books that as the sun approaches the end of the fusion process(the complete one) , it will expand and engulf some of the inner planets.
But why will it expand?
But why will it expand?
One should be able to find discussions on the topic of expansion by searching with "stellar evolution, expansion"shihab-kol said:I read in some books that as the sun approaches the end of the fusion process(the complete one) , it will expand and engulf some of the inner planets.
But why will it expand?
Ref: http://umich.edu/~gs265/star.htmThe next stage of solar fuel consumption starts when hydrogen burning in the core ceases and ignites hydrogen burning in the star's outer layers. When hydrogen burning ceases in the star's core, it begins to collapse again. At this point, the star converts gravitational energy into thermal energy because it must maintain thermal equilibrium.
Stars sustain thermal equilibrium within their interiors through the ignition of helium burning. The collapse of the outer hydrogen burning shell upon the core raises the temperature and pressure in the core and begins helium burning. Because the temperature and energy needed to ignite helium fusion is greater than that of hydrogen, the energy released by helium fusion in the star's core is greater than needed to support the weight of the outer layer.
This excess energy expands the star's outer layers beyond its previous radius and star's volume increases. A star going through this stage of fuel consumption (collapse and expansion) is a Red Giant. The following diagram shows the dramatic expansion of a main sequence star as it begins helium fusion.
It is hydrogen burning in a shell around the core that puffs it up. The helium flash could make the sun shrink temporarily. Helium will not be burned in the sun for hundreds of millions of years after leaving the main sequence and becoming a red giant.newjerseyrunner said:Because the core has run out of hydrogen fuel and is starting to burn helium. This creates far more heat, which causes it to puff up,
snorkack said:... Kirchhoff´s Law would allow any of the 5.
shihab-kol said:I read in some books that as the sun approaches the end of the fusion process(the complete one) , it will expand and engulf some of the inner planets.
But why will it expand?
The expansion of the Sun will cause an increase in solar radiation and heat, which can have a significant impact on the atmospheres and surfaces of the inner planets. This could potentially lead to changes in temperature, weather patterns, and planetary processes.
The Sun is expanding due to the fusion reactions that occur in its core. As the Sun burns through its reserves of hydrogen, it will gradually increase in size and temperature.
Yes, the expansion of the Sun can have a significant impact on life on Earth. As the Sun expands, it will become hotter and brighter, potentially making the planet uninhabitable for living organisms.
The expansion of the Sun is a gradual process that occurs over millions of years. It is estimated that the Sun will increase in size by about 50% over the next 5 billion years, with the inner planets being affected in the later stages of this process.
No, the expansion of the Sun is a natural process that is out of our control. However, it is important for us to continue studying and understanding these changes so that we can better prepare for the potential effects on our planet and its inhabitants.