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Answer the following Critical Thinking Question. You may respond to the answers of the other students after you have answered the question. This homework assignment is worth 5 points.

Two main sequence stars appear equally bright in the night sky. Star P has a spectral class of M2 and Star Q has a spectral class of B8. Explain your answers.

Which is cooler?
Which has a greater absolute magnitude?
Which emits more energy per unit surface area?
Which is closer to the observer?