standard candle

Found in Anh - Anh (Wordnet)

Definition Noun : A unit of luminous intensity : "Standard candle" is the former name for the basic unit of luminous intensity in the International System of Units (SI). It is now officially called the "candela." An astronomical object of known luminosity : In astronomy, a "standard candle" refers to a class of astronomical objects, such as certain types of stars or supernovae, whose intrinsic...