Unit of measurement in astronomy
The zodi is a unit of zodiacal dust. One zodi is the amount of zodiacal dust in the inner Solar System. This dust absorbs light from the Sun and re-radiates it as thermal radiation. The luminosity of the zodiacal dust in the Solar System is about formula_1 relative to the luminosity of the Sun, ;ref name=" doi:10.1088/0004-637X/713/2/816" ; in The Astrophysical Journal, 713, p. 816 ;/ref ; and in practice, this is the observable characteristic defining one zodi.
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