urca processes

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• Urca-process — In astroparticle physics, an Urca process is a reaction which emits a neutrino and which is assumed to take part in cooling processes in neutron stars. The process was first discussed by George Gamow and Mario Schenberg while they were visiting a …   Wikipedia

• Mário Schenberg — Born July 2, 1914 Recife, P …   Wikipedia

• White dwarf — For other uses, see White dwarf (disambiguation). Image of Sirius A and Sirius B taken by the Hubble Space Telescope. Sirius B, which is a white dwarf, can be seen as a faint pinprick of light to the lower left of the much brighter Sirius A …   Wikipedia

• George Gamow — Born March 4, 1904(1904 03 04) …   Wikipedia