Fr.: gaz raréfié
A gas whose pressure is much less than a reference pressure.
Fr.: gaz réel
Actual gas whose molecules do not necessarily possess the properties assigned to those of an → ideal gas.
Square of Pegasus
Fr.: Carrée de Pégase
A large → asterism of four stars, approximately square in shape, in the northern sky. Three of the stars, → → Markab, → Scheat, and → Algenib, belong to the constellation → Pegasus. The fourth, → Alpheratz, was lost to Pegasus when the constellation boundaries were formalised, and now lies just within the borders of → Andromeda.
Fr.: gaz ultrarelativiste
A gas composed of ultrarelativistic particles.
universal gas constant
pâyâ-ye hargâni-ye gâzhâ
Fr.: constante universelle des gaz
Same as → gas constant.