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However, it does not give a measure of the intrinsic brightness of the object.The amount of light/photons received by an observer on earth is dependent on the distance of the object and the actual intensity of the object.

Both are descriptives of where a geographic location is.He classified stars based on how bright they appear in the sky.Modern astronomers use a more mathematical approach to this, but the concept has not changed over the time of two millennia. Apparent magnitude is defined as the brightness of a celestial object as measured by an observer on earth, in the absence of the atmosphere.Also, the apparent magnitude of a celestial body may differ depending on the range of the electromagnetic spectrum in which it is being observed.The apparent magnitude of the same object observed in the infrared band is different from the amount observed in visible light.

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