Population II

English Alternative forms en population II Etymology Proposed by astronomer Walter Baade in 1944. Proper noun Population mul II en astrophysics usually _ attributively A population or group of stars formed early in the history of the Universe, characterized by having a low metallicity. en Population I Population III en https://web.archive.org/web/20220915043424/https://www.forbes.com/sites/briankoberlein/2019/12/11/the-stars-in-our-galaxy-are-more-varied-than-we-thought/ w:Forbes While the thick disk is largely composed of Population II stars, they found it contains two stellar populations. The Stars In Our Galaxy Are More Varied Than We Thought 2019-12-11 Brian Koberlein en https://web.archive.org/web/20220706234948/https://www.nbcnews.com/science/science-news/ancient-star-casts-new-light-birth-universe-rcna943 w:NBC News Those heavy elements were created by fusion within Population II stars that exploded as supernovas and seeded them into interstellar clouds. An ancient star casts new light on the birth of the universe 2021-05-21 Tom Metcalfe en https://web.archive.org/web/20221209010212/https://www.scientificamerican.com/article/astronomers-grapple-with-jwsts-discovery-of-early-galaxies1/ w:Scientific American The brightness of these galaxies could be attributed to such stars, which would be much hotter and brighter than subsequent Population II stars and Population I stars, such as our sun, both of which fill our modern-day universe. Astronomers Grapple with JWST’s Discovery of Early Galaxies 2022-12-06 Jonathan O'Callaghan Derived terms en Pop II abbreviation Category:Stars en terms containing Roman numerals