Ep. 3: Early Chemical Evolution
Автор: MIT OpenCourseWare
Загружено: 2019-09-27
Просмотров: 15673
Описание:
MIT RES.8-007 Cosmic Origin of the Chemical Elements, Fall 2019
Instructor: Anna Frebel
View the complete course: https://ocw.mit.edu/RES-8-007F19
YouTube Playlist: • MIT RES.8-007 Cosmic Origin of the Chemica...
The first stars formed from the primordial gas of just hydrogen and helium left behind after the Big Bang. Later generations of stars formed from gas enriched in metals that were previously forged in the cores of the first stars. This process of element production and enrichment of the surrounding gas is called the chemical evolution. Among the second and later generations of stars were low mass stars with long lifetimes that make them still observable today. This allows astronomers to study how elements were created over cosmic time.
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