Although it has a greater than Sirius, Rigel does NOT look as bright in the night sky. a. apparent magnitude c. black hole b. parallax d. absolute magnitude

d. absolute magnitude

Explanation:

Sirius and Rigel are stars present in the sky.

Rigel has a greater absolute magnitude than Sirius. Rigel has an absolute magnitude of -7.4 and Sirius has an absolute magnitude of 1.4. Rigel is much bigger than Sirius.

Rigel is not as bright as Sirius because of its apparent magnitude. Sirius is the brightest star.

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explanation: