The pulsar, a rapidly spinning neutron star, was discovered in 1967 by Antony Hewish and Jocelyn Bell. Together the pair detected electromagnetic radiation being broadcasted at regular intervals, which they believed might have been signals from aliens. Quasars also emit radio waves and radiation but are not technically stars. They are said to be starlike because they emit light. In fact, they are the brightest objects in the universe, more luminous than several thousand galaxies put together.