Question

question 9 (1 point)
an astronomer can estimate the temperature of a star by observing its
brightness
color
mass
size
shape

Explanation:

Stars follow Wien's Law, which links their surface temperature to the peak wavelength of light they emit. This peak wavelength corresponds directly to the star's observed color: hotter stars appear blue/white, cooler ones red/orange. Brightness depends on distance and size, while mass, size, and shape do not directly indicate surface temperature.

Answer:

color