The Milky Way's Pop I and II Stars
Join this channel to get access to perks: https://www.youtube.com/channel/UCdnMLnE83DzHgrVJxOhZdLw/join This is part of my complete intro Astronomy class that I taught at Willam Paterson University and CUNY Hunter. If you want to watch all the videos in the correct order, please visit my website at http://www.jasonkendall.com One the important discoveries about stellar evolution came by looking at how stars of different types and ages are distributed throughout our Galaxy. Supplement the videos with "OpenStax Astronomy" https://openstax.org/books/astronomy/pages/25-thinking-ahead 25 The Milky Way Galaxy 0:00 Introduction 0:01 NGC 891: A Milky Way Analogue 1:21 Disk and Spheroid 1:33 Spheroid Structure 2:34 Disk Structure 6:44 Walter Baade (c. 1944) 8:36 Stellar Lifespan Review 9:33 Baade divided stars into two Populations 11:07 Stellar Orbits: Pop I Disk Stars 11:47 Population II 12:35 Stellar Orbits: Pop II Spheroid/Halo Stars 13:07 Contrast and Compare 14:09 Chemical Evolution 15:15 From Ashes to Ashes, From Dust to Dust... 16:18 Galaxies evolve with time, too. 17:50 REVIEW QUESTIONS
Join this channel to get access to perks: https://www.youtube.com/channel/UCdnMLnE83DzHgrVJxOhZdLw/join This is part of my complete intro Astronomy class that I taught at Willam Paterson University and CUNY Hunter. If you want to watch all the videos in the correct order, please visit my website at http://www.jasonkendall.com One the important discoveries about stellar evolution came by looking at how stars of different types and ages are distributed throughout our Galaxy. Supplement the videos with "OpenStax Astronomy" https://openstax.org/books/astronomy/pages/25-thinking-ahead 25 The Milky Way Galaxy 0:00 Introduction 0:01 NGC 891: A Milky Way Analogue 1:21 Disk and Spheroid 1:33 Spheroid Structure 2:34 Disk Structure 6:44 Walter Baade (c. 1944) 8:36 Stellar Lifespan Review 9:33 Baade divided stars into two Populations 11:07 Stellar Orbits: Pop I Disk Stars 11:47 Population II 12:35 Stellar Orbits: Pop II Spheroid/Halo Stars 13:07 Contrast and Compare 14:09 Chemical Evolution 15:15 From Ashes to Ashes, From Dust to Dust... 16:18 Galaxies evolve with time, too. 17:50 REVIEW QUESTIONS