Exam-style question
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What does a star's absolute magnitude indicate when compared to its apparent magnitude?.
- A.The star's distance from Earth
- B.The star's brightness as seen from a standard distance
- C.The star's temperature
- D.The star's mass
Model answer
What a good answer should say
- The star's brightness as seen from a standard distance
Explanation
Why this works
Absolute magnitude measures a star's intrinsic brightness at a standard distance of 10 parsecs, while apparent magnitude is how bright the star appears from Earth. This distinction implies that absolute magnitude allows for a fair comparison of stellar brightness regardless of distance, leading to a clearer understanding of a star's true luminosity.
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