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How does the study of light provide knowledge about stars, galaxies, and the universe’s beginning? Answer in 3 to 4 sentences.
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How does the study of light provide knowledge about stars, galaxies, and the universe’s beginning?

Answer in 3 to 4 sentences.

User Padawin
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18 votes

Answer:

From spectral lines astronomers can determine not only the element, but the temperature and density of that element in the star. The spectral line also can tell us about any magnetic field of the star. ... The light from the stuff between the stars allows astronomers to study the interstellar medium (ISM).

User Paranoia
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