Question

Describe how astronomers determine the composition of a star.

Answer 1

Answer: Astronomers determine the composition of a star by analyzing their absorption and emission spectra. (This answer is correct)

Explanation: This allows for analysis of chemical makeup of distant bodies.

Answer 2

The spectra of the sun and stars exhibitee bright and dark lines called fraunhofer lines. Because each element absorbs light only at specific wavelengths, the chemical composition of stars can be determined.