The study of eclipsing binary stars is very important because it allows astronomers to determine
A) the distance between two stars.
B) the speed of stars from the Doppler shift of their spectral lines.
C) the diameters of stars.
D) the luminosity of each star.
E) the brightness of each star.

Question

Quizplus · Accepted Answer

Eclipsing binary stars allow astronomers to measure the diameters of stars by observing the duration of the eclipse. Additionally, the brightness of each star can be determined by analyzing the light curve during the eclipse.

The Study of Eclipsing Binary Stars Is Very Important Because