Magnitude of a star is correlated to its mass but they are not the same thing.Stars with more positive magnitude have lower brightness.Stars with more negative magnitude have greater brightness.Magnitude is expressed on a logarithmic scale.Magnitude of stars is usually expressed relative to the Sun which allows for simpler understanding and comparison.Magnitude and luminosity of a star are correlated greater the magnitude entails greater luminosity. The vertical axis of the H-R diagram may show the star’s absolute magnitude, relative magnitude, absolute luminosity or its luminosity relative to the sun. Determine as many characteristics of the star as possible, and its evolutionary stage by using other evidence available to you, such as: investigate the Hertzsprung-Russell diagram and how it can be used to determine the following about a star:.
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