To calculate the masses of stars in a binary system, we must measure their .

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To calculate the masses of stars in a binary system, we must measure their orbital period and average orbital distance using Kepler's laws of motion. By knowing this information, we can use Newton's laws of motion and the gravitational constant to solve for the masses of the stars. Measuring luminosities, absolute magnitudes, spectral types, and distance from Earth can also provide useful information about the stars, but they are not necessary for calculating their masses in a binary system.

To Calculate the Masses of Stars in a Binary System