Problem
In January, 1989, John Middleditch and his colleagues went to the Cerro Tololo Inter American Observatory in Chile with an exceptionally sensitive new light detector to look for the pulsar that was assumed to have been formed in the supernova. Pulsars, which can contain the mass of the sun in a body no more than 10 miles across, rotate extremely rapidly, emitting pulses of light like the beacon of a lighthouse at regular intervals of small fractions of a second.