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What is the difference between red and brown dwarf stars?
Red dwarf stars are massive enough to undergo nuclear fusion, so they would burn a long time before they run out of fuel. Brown dwarves are not massive enough for nuclear fusion, so almost all of its light come from the time when the brown dwarf was formed. Over a long period of time, a brown dwarf would cool down into a gas giant similar to Jupiter.
What is massive body of plasma that shines due to energy released by nuclear fusion?
The sun and other stars.
Are neutron stars dead?
Neutron stars are the remnants of massive stars that have gone supernova. While they are no longer actively undergoing nuclear fusion like main sequence stars, they are not truly "dead" as they continue to emit radiation and have incredibly strong gravitational fields.
Why can't massive stars generate energy from iron fusion?
Massive stars cannot generate energy from iron fusion because iron fusion does not release energy, rather it absorbs energy. Iron is the most stable element, and fusion of iron requires more energy than it produces, making it an unfavorable process for generating energy in stars. This leads to the collapse of the star's core and triggers a supernova explosion.
Why are less massive star thought to age more slowly than more massive star even though less massive stars have much less fuel?
Less massive stars age more slowly than more massive stars primarily because they burn their nuclear fuel at a much slower rate. While massive stars have more fuel, they also have higher core temperatures and pressures, leading to rapid fusion processes that exhaust their fuel quickly. In contrast, less massive stars, like red dwarfs, fuse hydrogen slowly and can maintain stable fusion for billions of years, resulting in a longer lifespan overall. Thus, their slower consumption of fuel contributes to their extended lifetimes compared to their more massive counterparts.
Does nuclear fusion in massive stars create heavy elements?
yes
What is the difference between red and brown dwarf stars?
Red dwarf stars are massive enough to undergo nuclear fusion, so they would burn a long time before they run out of fuel. Brown dwarves are not massive enough for nuclear fusion, so almost all of its light come from the time when the brown dwarf was formed. Over a long period of time, a brown dwarf would cool down into a gas giant similar to Jupiter.
What is massive body of plasma that shines due to energy released by nuclear fusion?
The sun and other stars.
Are neutron stars dead?
Neutron stars are the remnants of massive stars that have gone supernova. While they are no longer actively undergoing nuclear fusion like main sequence stars, they are not truly "dead" as they continue to emit radiation and have incredibly strong gravitational fields.
Why can't massive stars generate energy from iron fusion?
Massive stars cannot generate energy from iron fusion because iron fusion does not release energy, rather it absorbs energy. Iron is the most stable element, and fusion of iron requires more energy than it produces, making it an unfavorable process for generating energy in stars. This leads to the collapse of the star's core and triggers a supernova explosion.
How many stars are there and why they shine?
Innumerable stars are there in the space. Our sun is also a star. Almost all stars shine because of fusion of hydrogen nuclei.
What type of reaction causes stars to combine hydrogen and release massive amounts of radiation?
This involves "nuclear fusion" reactions.
Can iron undergo fusion in any star?
No. Only the most massive stars can fuse iron.
Why is massive star more luminious than a less massive star?
This fact can explain with the help of nuclear fusion in small stars and massive stars in small stars like our sun nuclear fusion followed by the proton -proton chain reaction in which main products are positron, gamma ray photon, neutrino and isotopes of hydrogen and helium and energy released in millions of electron volts but in the case of massive stars nuclear fusion is followed by the carbon-nitrogen-oxygen cycle and helium can further transform into the carbon by triple alpha process and in the massive star much heavier elements can burn producing very large amount of energy than our sun and some of the massive star can produce luminosity 60000 times more than our sun
Is there any stars in space?
Yes, there are billions of stars in space. Stars are massive celestial bodies that produce light and heat through nuclear fusion. They can be found in galaxies, nebulae, and throughout the universe.
Is the lifespan of small stars are much slower or faster than a massive star?
Yes we can say, life span of small stars are slower than bigger one because in the small star the nuclear fusion takes place at the moderate rate but massive stars require large amount of energy and therefore nuclear fusion consume all it's fuel in short Time As compare to small stars also mechanism of nuclear fusion in both case followed by different ways
Why are less massive star thought to age more slowly than more massive star even though less massive stars have much less fuel?
Less massive stars age more slowly than more massive stars primarily because they burn their nuclear fuel at a much slower rate. While massive stars have more fuel, they also have higher core temperatures and pressures, leading to rapid fusion processes that exhaust their fuel quickly. In contrast, less massive stars, like red dwarfs, fuse hydrogen slowly and can maintain stable fusion for billions of years, resulting in a longer lifespan overall. Thus, their slower consumption of fuel contributes to their extended lifetimes compared to their more massive counterparts.
