Final answer:
The spectra of stars reveal information about their temperature and motion. The temperature of a star affects the color and shape of its spectrum. Additionally, the Doppler effect can be used to determine the motion of stars.
Step-by-step explanation:
The spectra of real stars can be analyzed using Kirchhoff's laws. The spectra of stars reveal information about their temperature and motion. The temperature of a star affects the color and shape of its spectrum. Hotter stars have spectra that tilt towards the blue end of the visible spectrum, while cooler stars have spectra that tilt towards the red end. Additionally, if a star is moving towards or away from us, its spectral lines will be shifted. This is known as the Doppler effect and can be used to determine the motion of stars.