Exam-style question
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What is the definition of apparent magnitude in astronomy?.
- A.The brightness of a star as seen from Earth
- B.The intrinsic brightness of a star at a standard distance
- C.The brightness of a star when viewed from a different galaxy
- D.The brightness of a star adjusted for distance
Model answer
What a good answer should say
- The brightness of a star as seen from Earth
Explanation
Why this works
Apparent magnitude is defined as the brightness of a star as observed from Earth, which can vary based on distance and interstellar material. This is distinct from absolute magnitude, which measures intrinsic brightness at a standard distance.
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