Abstract

Studies in astronomy and stellar astrophysics have played a significant role in the ongoing research of the Specola Vaticana throughout its history. Within the last 150 years, this has been evidenced by the work of Angelo Secchi in the 19th century, by the Specola’s participation in the 19th–20th century Carte du Ciel project, and by the Observatory’s sponsorship of the prominent Vatican Conference on Stellar Populations in 1957. The latter was a milestone in the understanding of stellar populations. Since then, the astronomy community’s knowledge of stellar populations, especially with regard to the various components of the Milky Way Galaxy and other galaxies, along with globular and open clusters, has increased greatly, commensurate with the advent of more powerful telescopes. The Specola Vaticana continues to contribute actively to such astrophysical studies by research conducted on photometric surveys of portions of the Milky Way Galaxy and also by the study of extreme horizontal branch stars that are thought to be ubiquitous in most stellar populations.