Ep. 4: The First Chemical Enrichment Events скачать в хорошем качестве

Ep. 4: The First Chemical Enrichment Events

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 forged metals heavier than hydrogen and helium in their cores to produce energy to shine. These heavier elements were then expelled into space once the stars exploded as the first massive supernovae. Since then, massive exploding stars have contributed elements to the universe thus setting in motion the cosmic chemical evolution. Consequently, old stars formed from gas enriched by only one or few supernovae and younger stars like the sun formed from gas enriched by perhaps a thousand events. License: Creative Commons BY-NC-SA More information at https://ocw.mit.edu/terms More courses at https://ocw.mit.edu