Which of the following is least reasonable regarding the magnitude scale: Group of answer choices The numerical difference between a star's absolute and apparent magnitudes is a measure of the distance to the star.   If the Sun were moved to a distance of 10 parsecs, its apparent magnitude would be about 4.8 and it would therefore not be visible to the naked eye.   The fact that Sun's absolute magnitude of 4.8 is greater than the Sun's apparent magnitude of -27 implies that the Sun is a lot closer than 10 parsecs.

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Which of the following is least reasonable regarding the magnitude scale:
Group of answer choices
The numerical difference between a star's absolute and apparent magnitudes is a measure of the distance to the star.
 
If the Sun were moved to a distance of 10 parsecs, its apparent magnitude would be about 4.8 and it would therefore not be visible to the naked eye.
 
The fact that Sun's absolute magnitude of 4.8 is greater than the Sun's apparent magnitude of -27 implies that the Sun is a lot closer than 10 parsecs.
 
Apparent magnitude measures a star's apparent brightness when viewed at the star's actual distance from the observer.
 
A star's absolute magnitude is its apparent magnitude when viewed from a distance of 10 parsecs.
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