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First magnitude star

First magnitude star


The magnitude system is a system that classifies celestial bodies based on their brightness. The scientist who first classified the magnitude of Star is the Greek astronomer Hipparcus in the 129th century BC who has 1,080 Stars in its catalog by setting 6 levels where the first level is the star with the highest brightness.
Around the year 1830, John Herschel reached the conclusion that a series of measurements in the brightness of the Stars is associated with the development of arithmetic magnitude them. The problem is then to determine exactly the constant value of the ratio of the brightness corresponding to the difference of one magnitude.
So a 1st magnitude star is 100 times brighter than the 6th Star magnitude. In addition, some Stars in the sky look brighter than the average magniudo Star to -1 then the Star has a negative magnitude size.
All Stars lie at different distances from us. An actual bright star will look more dim because of the distance away, while the Stars are dim but close the distance will look brighter. Therefore, the brightness of a star visible from Earth is called apparent magnitude. While the brightness of a Star measured from a distance of 10 parsec (333 light years) is called absolute magnitude
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