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When a star tuns red it ceases to fuse hydrogen in its core and starts to fuse other elements (notably helium). When this happens the core shrinks but gets much hotter and the outer envelope of the star expands. This means that while the star is pumping out more energy this is happening over a wider area of surface so the temperature of any one area of the stellar surface is lower than it was before - and the star looks red.
What else can I help you with?
What happens to a nova star after it becomes so bright?
after a nova star becomes bright it turns into a dwarf and explodes.
When a main-sequence star has exhausted the fuel in its core it becomes a....?
I am pretty sure it becomes a giant if I'm not mistaken.
When a star changes from blue to red what happens to the surface temperature?
The temperature is lowered.
When a main sequence has exhausted the fuel in its core it becomes?
The next step in its life is to become a "red giant" star.
What happens when the sun looses enrgey?
The sun enrgey goes in the white dwarf and the sun becomes a giant bright star then it is.
What happens when a star burns all of its hydrogen?
When a star burns up all of its hydrogen,it becomes red in color.As hydrogen is the fuel for star and it will burst after it.
What is the difference between a star that becomes a red giant and one that becomes a red supergaint?
The mass of the star.
What happens to a nova star after it becomes so bright?
after a nova star becomes bright it turns into a dwarf and explodes.
What are the red giants?
A red giant is when a star becomes very large. A super red giant is when a star becomes very extremely large. People think that in a few billion years, our sun will become a red giant and swallow up earth.
What do you call a star that is bigger then a regular one?
first its called the main sequence star like the sun then it becomes a red giant then it becomes a red super giant and if it is huge a hyper-giant like VY Canis Majoris (largest star known) then it explodes and it becomes a planetary nebula then it becomes a white dwarf
What happens when you add toothpaste to beetroot?
becomes dark red
When a main-sequence star has exhausted the fuel in its core it becomes a....?
I am pretty sure it becomes a giant if I'm not mistaken.
What happens when you put a red filter in front of a light?
the light becomes red :-P
Does a red main sequence star have fusion?
A red main sequence star would be a red dwarf or a branch red giant. To be on the main sequence, you have to have hydrogen nuclear fusion.
What happens to the colour pink it is red?
When you mix the color white with the color red, it becomes pink.
When a main sequence star has the fuel in its core it becomes?
The next step in its life is to become a "red giant" star.
When a main-sequence star has exhausted the fuel in its core it becomes a .?
The next step in its life is to become a "red giant" star.
