pulsar

plural pulsars

1. astronomyA rotating neutron star that emits radio pulses periodically.

   1 more example

   Rapidly rotating dead stars, pulsars are so named because as they spin, they release beams of electromagnetic radiation across space that appear to pulse like celestial lighthouses. But a pulsar called PSR J1023+0038, located about 4,500 light-years away from Earth in the Sextans constellation, is even more unusual in that some of the pulses are brighter than others, almost like it’s switching between different modes.

   2023 August 30, Ashley Strickland, “Astronomers solve the puzzle of an unusual pulsing dead star”, in CNN

   Synonyms: PSR