MIT 8.962 General Relativity, Spring 2020 - 18. Cosmology I

MIT 8.962 General Relativity, Spring 2020 Instructor: Scott Hughes View the complete course: https://ocw.mit.edu/8-962S20 YouTube Playlist: https://www.youtube.com/playlist?list=PLUl4u3cNGP629n_3fX7HmKKgin_rqGzbx Cosmology and cosmological spacetimes.  This is the first spacetime we compute using a symmetry principle.  By requiring that a spacetime be spatially maximally symmetric (i.e., that it have the largest number of possible Killing vectors), we constrain the functional form of its metric.  Imposing the Einstein field equations, we develop a pair of simple equations that control how the overall scale of this spacetime evolves.  The properties of the matter and energy which fill this universe then determine the universe's geometry and how it evolves with time. License: Creative Commons BY-NC-SA More information at https://ocw.mit.edu/terms More courses at https://ocw.mit.edu Support OCW at http://ow.ly/a1If50zVRlQ We encourage constructive comments and discussion on OCW’s YouTube and other social media channels. Personal attacks, hate speech, trolling, and inappropriate comments are not allowed and may be removed. More details at https://ocw.mit.edu/comments.