Question

the supergiant star alnitak is one of the hottest stars identified by astronomers. what color must it be? red blue yellow orange

Explanation:

The color of a star is related to its temperature. Hotter stars emit more energy at shorter - wavelength (blue) light, while cooler stars emit more at longer - wavelength (red) light. Since Alnitak is one of the hottest stars, it must be blue.

Answer:

B. blue