I have read that most stars are made mostly of plasma.
My questions in this statement are:
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Are there stars not made of plasma?
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In what percentage stars are made of plasma?
astrophysicsplasma-physicsstars
I have read that most stars are made mostly of plasma.
My questions in this statement are:
Are there stars not made of plasma?
In what percentage stars are made of plasma?
Best Answer
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For more details see this link too.
A basic effect of the motion of charges is that electromagnetic radiation is created, i.e. light and thus stars certainly have plasma because they are called stars for being stationary sources of light in the night sky, in contrast to planets. The sun in the center of the solar system is a star and allows us to study the composition of stars, including the evident plasma.
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[note that "all other stars is not really correct in this wiki link. see below]
Stars that are not wholy plasma are neutron stars:
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They are complex stars.
Also very large stars that become supernovae, and in general the whole spectrum in the evolution of stars has stars which are not wholly plasma.
To be visible stars, they have to emit light so that their outer shell must be plasma.
So plasma in the outer atmosphere is necessary for a star to be visible in the night sky, but there do exist stars that are not wholly plasma. Thanks to DrunkenCodeMonkey for catching it.
you ask:
They are mostly plasma, i.e neutral ionized matter, even the core, because of the very large kinetic energies acquired in the formation from the primordial plasma due to the gravitational attraction .
This very high temperature does not allow nuclei and electrons to stabilize into neutral atoms, and even at that high density the core is a plasma. The temporary formation of neutral nuclei gives spectral lines detectable in the star's spectrum, but the temperatures are so high that no solid core can result. The amount of neutral atoms in a plasma is very small, and is controlled by the relevant equations, as was pointed out in the comments.
The planetary masses cooled off enough to acquire a solid core.