How much brighter is a star with a magnitude of 1 than one of magnitude 6?
Answer
100 times brighter.
The apparent magnitude system used to measure brightness is constructed on a logarithmic scale rather than a linear one. Specifically, a difference of five whole numbers on this scale corresponds to a factor of exactly 100 in brightness. Therefore, a star designated with a magnitude of 1 is 100 times brighter than a star assigned a magnitude of 6. Conversely, a larger positive number indicates a dimmer object; for example, a magnitude 1 star is 100 times brighter than a magnitude 6 star, and 10,000 times brighter than a magnitude 11 star (100 times 100).
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