Multiple Choice
Sirius, visually the brightest star in Earth's night sky, has an apparent magnitude of about -1.5, while the Andromeda Galaxy has an apparent magnitude of about +3.5. What is the ratio of their brightnesses, as seen by Earthbound observers?
A) The Andromeda Galaxy is 100 times brighter than Sirius.
B) The Andromeda Galaxy is 2 times fainter than Sirius.
C) The Andromeda Galaxy is 5 times brighter than Sirius.
D) The Andromeda Galaxy is 100 times fainter than Sirius.
Correct Answer:
Verified
Correct Answer:
Verified
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