Question

a main - sequence star of spectral type b8 and a white dwarf star with a spectral type of b8 must have the same temperatures, must have different distances, and could have either the same or different none of these options fit. distances. luminosities. temperatures.

Explanation:

The spectral type of a star is determined primarily by its surface temperature. Stars of the same spectral type have the same surface temperature. Luminosity depends on both temperature and size, and distance has no relation to spectral - type. So two stars of the same spectral type must have the same temperature.

Answer:

D. temperatures