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“relation”
(A suffix forming nouns meaning: quality or condition: partnership; act, power, or skill: workmanship; relation between: friendship; office, position, or occupation: governorship; number: readership)
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“relation”
An empirical relation between the mass and luminosity, both usually expressed in solar units, for main sequence stars: The mass-luminosity relation was predicted by Eddington in 1924.
For sunlike stars, the luminosity varies as the 3.5 power of the mass.
The power is smaller for lower mass stars.
This entry is located in the following unit:
Astronomy and related astronomical terms
(page 15)
A relation obeyed by cepheid variable stars (highly luminous yellow or orange super giant stars that varies regularly in brightness): The period-luminosity relation relates to the period of the changes in luminosity that varies directly with the luminosity of the star.
This entry is located in the following unit:
Astronomy and related astronomical terms
(page 18)