Apparent magnitude and absolute brightness differ in how they describe the brightness of celestial objects, taking into account distance and intrinsic luminosity respectively.
Apparent magnitude and absolute brightness are two important concepts in astronomy that describe the brightness of celestial objects. Apparent magnitude refers to how bright an object appears to us on Earth, taking into account the distance between the object and the observer. On the other hand, absolute brightness represents the intrinsic brightness of an object independent of its distance. An example illustrating this difference is that the Sun has an apparent magnitude of about -26.74 as seen from Earth, but its absolute magnitude is around 4.83. This discrepancy is due to the Sun's proximity to Earth, affecting how bright it appears versus its actual intrinsic brightness.
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