  We compute the power radiated per unit solid angle of a moving magnetic
dipole moment, and its instantaneous radiated power, both non-relativistically
and relativistically. This is then applied to various interesting situations:
solar neutrons, electron synchrotrons and cosmological Dirac neutrinos.
Concerning the latter, we show that hypothesized early-universe Big Bang
conditions allow for neutrino radiation cooling and provide an energy
loss-mechanism for subsequent neutrino condensation.
