Big Bang model
model-e Meh Bâng, ~ Big Bang
Fr.: modèle du big bang
Fr.: modèle de Cowling
A model of the internal structure of → massive stars in which a → convective core is surrounded by a large → radiative envelope. However, recent studies point to the presence of a thin → convection zone in the outer envelope of hot massive stars, beneath the → photosphere, which is caused by opacity peaks associated with iron and helium ionization. See also → iron convection zone.
After Thomas Cowling (1906-1990), a British astronomer, who put forward the model; → model.
tarz-e g, mod-e ~
Fr.: mode g
g referring to gravity; → mode.
Fr.: modèle de pointage
A mathematical model that reproduces the diurnal rotation of the Earth and is used to direct a telescope toward a precise position on the sky.