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What do astronomers analyze to determine the composition and surface temperature of a star

What do astronomers analyze to determine the composition and surface temperature of a star
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What do astronomers analyze to determine the composition and surface temperature of a star

User Vinh Trieu
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This is more of a science question
You would get more answers there
User Damien Ryan
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They look at the light from the star using a spectrometer. The composition of the light tells them what elements are present in that star
User Santacrab
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