Cometary plasma tails are accelerated by the solar wind to ≈ half its velocity, corresponding to some 10/sup2 times the solar-wind momentum density. The authors corroborate Alfvén's (1957) "wind-sock" mechanism according ...

The authors suggest a model for the millisecond pulsar PSR 1937+214, according to which the immediate progenitor of the pulsar was a binary consisting of two neutron stars of unequal mass. The heavier neutron star was spun ...