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How is it possible for two stairs to have the same aparent magnitude but different absolute magnitude?
ItssDEFaisha
Apparent magnitude is the brightness as viewed from Earth
Absolute magnitude is the brightness as viewed from the same distance - 32 light years.
Therefore a star that is twice as bright but further away could have the same apparent magnitude but a different absolute magnitude.
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∙ 14y ago
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How bright is a star if its absolute magnitude is -1.4?
For historical reasons, the ratio of brightness that represents a change of 1 visual magnitude is defined as the 5th root of 100. So the ratio of brightness between two stars whose apparent visual magnitudes differ by 1 is 2.512 (rounded). The brighter star is 2.512 times as bright as the 'dimmer' one . A difference of 5 magnitudes is a difference of 100 times in brightness, which the difference between a 1st magnitude star and a 6th magnitude one.
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