:: : Apparent bightness / apparent luminosity sure does vary with distance, perhaps you were thinking of absolute brightness / absolute luminosity?
2.
More extrasolar planets were later detected by observing the variation in a star's apparent luminosity as an orbiting planet passed in front of it.
3.
However, I wasn't trying to compute the absolute luminosity of the star, rather the apparent luminosity, observed at the distance of the planet.
4.
In 1590, Gregorio Comanini described an invention by the Mannerist painter Arcimboldo of a system for creating color-music, based on apparent luminosity ( light-dark contrast ) instead of hue.
5.
How all of these effects modify the brightness, or apparent luminosity, of a moving object is determined by the equation describing the relativistic Doppler effect ( which is why relativistic beaming is also known as Doppler beaming ).
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