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A star's color is caused by the type of gases its made up of and the temperature. The temperature changes depeding on the age of the star. Older stars turn red due to the amount of space it has to heat up.

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10y ago
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10y ago

Those characteristics depend mainly on a star's mass.

Most stars would start consisting mainly of hydrogen-1.

After a while, they burn up that fuel, and have more helium-4.

Later they can create heavier elements (the so-called "metals").

The color of a star depends almost entirely on its surface temperature.

The hottest stars are blue or bluish white in color.

(The star's chemical composition only affects the narrow "absorption" lines in the otherwise continuous spectrum.)

For "Main Sequence" stars that temperature is closely related to the star's mass.

Also the size is related to mass.

So, in simple terms, more mass means higher temperature and size.

Most stars are Main Sequence stars, but many are not.

Things for those other stars are more complicated.

Color and temperature are still closely related. However, color and size are no longer related in a simple way.

For example, a red giant star is much larges than a red dwarf star, but has a similar surface temperature.

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5y ago

this observation can be made in general daily. burning wood gives you yellow flame but on a gas stove you get a blue flame. the temperature in both cases are different and colour of flame also. the temperature determines the surface colour of stars

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6y ago

A star's color is determined by its temperature. White is hottest, working down to blue, yellow, orange, and red. O type is hottest, then, B, A, F, G, K, and the relatively coolest, M.

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6y ago

The color of a star basically reflects its surface temperature. Stars have different temperatures.

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11y ago

from the hottness or coldness of a star

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Q: Why the stars are different colors?
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