If a star is 13.7 light years away from earth, how can we tell which elements it is made of?

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asked May 11, 2018 188k views

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Greenbandit · Answer 1 · 2018-05-16T01:42:49+0000

Light year is a unit of measure of time that makes use of the speed of light and distance between objects to determine the number of years it will take for the light to travel. We can determine what element the object is made up of by the wavelength of the color.

If a star is 13.7 light years away from earth, how can we tell which elements it is made of?

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