From a theoretical standpoint, what is a pulsar?
A)a star that is burning iron in its core
B)a binary system that happens to be aligned so that one star periodically eclipses the other
C)a neutron star or black hole that happens to be in a binary system
D)a rapidly rotating neutron star
E)a star that alternately expands and contracts in size

Question

Quizplus · Accepted Answer

A pulsar is a rapidly rotating neutron star that emits beams of electromagnetic radiation from its magnetic poles. As the star rotates, these beams sweep across the sky and can be detected by telescopes on Earth, appearing as a series of regular pulses of radiation.

From a Theoretical Standpoint, What Is a Pulsar