We can measure the radii of stars in eclipsing binary systems.

Name: We can measure the radii of stars in eclipsing binary systems.
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In eclipsing binary systems, when one star passes in front of the other, it blocks some of the light from the other star. By analyzing the light curve during the eclipse, we can determine the radii of the stars relative to each other, and therefore determine their actual radii through known distances and scaling factors.

We Can Measure the Radii of Stars in Eclipsing Binary