Scientists sketch aged star system using over a century of observations

Astronomers have painted their best picture yet of an RV Tauri variable, a rare type of stellar binary where two stars - one approaching the end of its life - orbit within a sprawling disk of dust. Their 130-year dataset spans the widest range of light yet collected for one of these systems, from radio to X-rays.

source https://www.sciencedaily.com/releases/2021/03/210312155446.htm