What device can be used for observing stars and other objects?
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Asked in Astronomy, Planetary Science, Stars
How do you determine the mass of a star?
Determining the mass of the star accurately is only possible with binary stars or stars with objects orbiting around them, usually planets. By observing the motion of the two objects it's possible to determine mass of both objects, using Kepler's 3rd law [See related link] For other stars, an approximation is made based on the type of star, it's radius and comparing it with other stars of a similar type and of a known mass.