Dark Matter in the Milky Way and Beyond

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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

Dark matter is a great mystery. It has mass but doesn't interact with light at all. So how do we know it exists? Watch!

Supplement the videos with "OpenStax Astronomy"
https://openstax.org/books/astronomy/...
25 The Milky Way Galaxy

0:00 Introduction
0:01 The Link to Newton's Gravity
4:41 Circular Motion due to a Central Force
6:16 Circular Motion due to Gravity
7:16 Measuring Rotation Speed of Galaxies
8:54 The Rotation of the Galaxy's Disk
13:30 The Mass of the Milky Way Galaxy
16:56 Example: Milky Way
19:56 Dark Matter in the Milky Way
21:43 Rotation Curves of Other Galaxies
23:20 23% is Dark Matter
26:38 The Dark Matter of the Milky Way Galaxy
30:31 Dark Matter Halos
31:27 Dark Matter in Galaxy Clusters
38:45 The Musket Ball Cluster
42:43 REVIEW QUESTIONS