how do spectrographs help astronomers classify stars?\no they determine the size of stars.\no they evaluate…

how do spectrographs help astronomers classify stars?\no they determine the size of stars.\no they evaluate the color of stars.\no they measure the brightness of stars.\no they analyze the composition of stars.

how do spectrographs help astronomers classify stars?\no they determine the size of stars.\no they evaluate the color of stars.\no they measure the brightness of stars.\no they analyze the composition of stars.

Answer

Answer:

D. They analyze the composition of stars.

Brief Explanation:

Spectrographs break light into spectra. By studying spectral lines, astronomers can identify elements in a star's atmosphere, thus analyzing its composition for classification.