Luminosity Class
In astronomy, the total brightness of a star; the total amount of energy in all wavelengths of light per second.

Yerkes Luminosity Classes

IaVery luminous supergiants
IbLess luminous supergiants
IILuminous giants
VMain sequence stars (dwarf stars)
VIIWhite dwarfs

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Development Notes
Text by M. Alan Kazlev

Initially published on 03 December 2001.