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A)... A. B)... B. To determine the star's temperature from its color, astronomers measure the brightness of the star at a series of wavelengths and then determine at which wavelength it emits the most light; that is, at which wavelength is it brightest.We will call that wavelength.. B)... B. To determine the star's temperature from its color, astronomers measure the brightness of the star at a series of wavelengths and then determine at which wavelength it emits the most light; that is, at which wavelength is it brightest.
The fact that the temperature and energy generation of an object can be determined by its Planck curve made the study of spectrum the key component to stellar astronomy. The amount of energy emitted from stars is determined by measuring their brightness or the amount of light they emit. This is called photometry.