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Apparent magnitude references on wikipedia


Apparent_magnitude
apparent magnitude (m) of a celestial body is a measure of its brightness as seen by an observer on Earth, normalized to the value it would have in the absence of the atmosphere. The brighter the object appears, the lower the value of its magnitude.

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Harvard home Harvard.eduHarvard home

Heavens-Above Home Page Heavens-above.comHeavens-Above Home Page

The University of Nottingham Nottingham.ac.ukThe University of Nottingham