https://www.universetoday.com/articles/cepheid-variables-are-the-bedrock-of-the-cosmic-distance-ladder-astronomers-are-trying-to-understand-them-better
Cepheid Variables are the Bedrock of the Cosmic Distance Ladder. Astronomers are Trying to...
cosmic distance laddercepheid variables
https://eso.org/public/poland/videos/eso1504b/?lang
Zooming in on the Trifid Nebula, and two Cepheid variables far beyond | ESO Polska
https://www.mdpi.com/2218-1997/8/2/122
RR Lyrae and Type II Cepheid Variables in Globular Clusters: Optical and Infrared Properties
Globular clusters are both primary fossils of galactic evolution and formation and are ideal laboratories for constraining the evolution of low-mass and...
type ii cepheid variables