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Which types of stars is considered part of the main sequence?
Main sequence stars include dwarf stars like red dwarfs, yellow dwarfs (like our Sun), and blue dwarfs. These stars are in a stable phase of hydrogen fusion in their cores, where the energy generated by nuclear reactions supports the star against gravitational collapse.
Are all the dwarfs dwarfs?
All of the dwarves are currently hiding in Linda Hornsby's goody bag awaiting the nuclear winter.
What prevents thermonuclear reactions in white dwarfs?
A lack of any fuel
If white dwarfs have exhausted their fuel why are they hot?
White dwarfs remain hot after exhausting their nuclear fuel because of residual heat from their previous nuclear reactions. The heat produced during their formation and contraction also contributes to their high temperatures. Additionally, white dwarfs have no way to generate new energy, so they gradually cool over billions of years.
What is the smallest mass a newborn star can have?
The smallest mass a newborn star can have is about 8% of the mass of our Sun, which is known as the hydrogen burning limit. Below this threshold, the core temperature and pressure are not sufficient to sustain nuclear fusion reactions that define a star. These lower mass objects are classified as brown dwarfs, which lack the ability to generate energy through sustained nuclear fusion reactions like stars.
Why doesn't nuclear fusion take place in a white dwarf?
Nuclear fusion doesn't take place in a white dwarf because the core temperature and pressure aren't high enough to initiate the fusion of heavier elements such as carbon and oxygen. White dwarfs have already exhausted their nuclear fuel and are essentially the leftover cores of stars that have gone through their fusion stages.
How do white dwarfs form and what are the key processes involved in their formation?
White dwarfs form from the remnants of low to medium mass stars after they have exhausted their nuclear fuel. During this process, the star sheds its outer layers, leaving behind a dense core composed mostly of carbon and oxygen. The key processes involved in the formation of white dwarfs include nuclear fusion, gravitational collapse, and electron degeneracy pressure.
Are giants hotter than white dwarfs?
No, white dwarfs are much hotter than giants. Giants are stars in the later stages of their evolution, while white dwarfs are the remnants of dead stars that have exhausted their nuclear fuel. White dwarfs can have surface temperatures in the tens of thousands of degrees Kelvin, while giants have lower surface temperatures.
What is the average temperature for a white dwarf star?
The average temperature for a white dwarf star is around 10,000 to 100,000 Kelvin, which is significantly cooler than other types of stars. Despite their high temperatures, white dwarfs are considered "dead" stars as they no longer undergo nuclear fusion reactions in their cores.
What do stars that have ejected a planetary nebula eventually become?
Stars that have ejected a planetary nebula eventually become white dwarfs. These are core remnants of low to medium mass stars that have exhausted their nuclear fuel. White dwarfs gradually cool down over billions of years to become black dwarfs.
Why do all dwarfs have the same voice?
because they have all got aids from hiding in Linda Hornsby's goodie bag awaiting the nuclear war.
When a white dwarf star no longer emits energy what does it become?
When a white dwarf star no longer emits energy, it becomes a black dwarf. Black dwarfs are theoretical end points of stellar evolution where all nuclear reactions have ceased, and the star has cooled down to the background temperature of the universe.
