20 years keeping an eye on R Aquarii
(PHYSorg.com Space & Earth)

An international team of researchers, including scientists from the Instituto de Astrofísica de Canarias, has published a detailed study of the evolution of the nebula surrounding the symbiotic star R Aquarii. The study involved observations from telescopes at the Roque de los Muchachos Observatory, La Palma, and Chile taken over the course of more than two decades.