Beginning at left, astronomers use Hubble to measure the distances to a class of pulsating stars called Cepheid Variables, employing a basic tool of geometry called parallax. (sciencedaily.com)
Astronomers are searching for variable stars in NGC 206, particularly pulsating stars known as Cepheids and eclipsing binary star systems. (apod.nasa.gov)
Normal pulsars (short for pulsating stars) are rapidly spinning neutron stars. (sciencemag.org)