1) Atari 8-bit family game 2) DOS game 3) ZX Spectrum game 
The equivalent of an earthquake in a neutron stars: the favored explanation for glitches, or sudden changes that have been observed in the period of some pulsars. As a pulsar gradually slows down in its rate of rotation (see spin-down), its slightly oblate shape will tend to become spherical. The re...
a rapid change in the mass distribution or shape of a pulsar, resulting in a fluctuation of the pulsar's pulse rate or radiation intensity.