
Luminosity
Scope of Comparison
Luminosity in astronomy usually involves comparisons with known brightness references like our Sun.

The luminosity of Sirius is almost twice that compared to our Sun.
Not Surface Brightness
Luminosity is the total light emitted, not just how bright a star appears on the surface.

Despite its size, the luminosity of Betelgeuse is due to its total energy output.
Measurement Complexity
Astronomical luminosity is complex, taking into account distance and inherent brightness.

Astronomers study a star's spectrum to accurately determine its luminosity.
Compare with
BrightBrillianceEffulgenceGlowIncandescenceIridescenceLightRadianceShimmerSplendour
WordUp Chrome Extension
As you browse the web instantly look up words you don’t know.
Get Chrome Extension