Can a Circle Be a Straight Line?

Want to ask some sort of crazy question about Space?: Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Comment on Reddit: http://www.reddit.com/r/pbsspacetime Support us on Patreon! http://www.patreon.com/pbsspacetime Help translate our videos! http://www.youtube.com/timedtext_cs_panel?tab=2&c=UC7_gcs09iThXybpVgjHZ_7g Let us know what topics you want to learn more about: http://bit.ly/spacetimepoll General Relativity! Spacetime! And... Curved Lines? On this week s episode of Spacetime, Gabe talks about what it actually means for a line to be straight so we can better understand what we mean by the idea of "curved Spacetime". This is Part One of our series on General relativity, so be sure to check it out! Links to Annotated Previous PBS Space Time Episodes: "Is Gravity an Illusion?" https://www.youtube.com/watch?v=NblR01hHK6U "Are Space and Time an Illusion?" https://www.youtube.com/watch?v=YycAzdtUIko Extra Credit: Visualizing parallel transport and geodesics on a sphere: http://www.applet-magic.com/paralleltransport.htm http://www.smith.edu/physics/felder/curvedland/tutlines.html More mathematical PDF about parallel transport and curvature: http://www.physics.ucc.ie/apeer/PY4112/Curvature.pdf ----------------------------------------­­­­­­­­­­­­­­­--------------------------­-­-­-­-­- Comments: Jordan Filipovski https://www.youtube.com/watch?v=bT3hBK6kAJQ&lc=z125y1czyym1i12q204ccvn4fzvqhjg5uus0k MaybeFactor https://www.youtube.com/watch?v=bT3hBK6kAJQ&lc=z13wyrlqivrwu34is04civgpczbztvcqg40 scharfy https://www.youtube.com/watch?v=bT3hBK6kAJQ&lc=z13wtrl4xojqhx4pw04cfnig3tantf4hjdc ourpensareourlips https://www.youtube.com/watch?v=bT3hBK6kAJQ&lc=z125it5y0mnetfcmo22ssvxamvelud4i004 JakeFace0 https://www.youtube.com/watch?v=bT3hBK6kAJQ&lc=z12dhvjqmtqltxidj22zjlq5fsumsbib304 QuannanHade https://www.youtube.com/watch?v=bT3hBK6kAJQ&lc=z12iildz2pacjfms122lspjglnudh1idf Ali Muzaffar https://www.youtube.com/watch?v=bT3hBK6kAJQ&lc=z13ccvo5kw3cftgkf23htf45bxqiwxvph04 Marko Nara https://www.youtube.com/watch?v=bT3hBK6kAJQ&lc=z133zfmhzyzezbxm523ayp2pxq35fbjbj04 Indigo https://www.youtube.com/watch?v=bT3hBK6kAJQ&lc=z13pcbqphnvvtnspe04cdp4hstflxnwh5as Jose Catlett https://www.youtube.com/watch?v=bT3hBK6kAJQ&lc=z13wgfewdtmutxmrf04cj1aqhtzsft4h31g Music: u dont know im fadin Secret Society - Logical Disorder (http://logicaldisorder.bandcamp.com/) Movement 3 - Janne Hanhisuanto (https://soundcloud.com/jannehanhisuanto) Philly D Jr - Patternbased (https://soundcloud.com/patternbased) Earth Breath - Human Terminal (http://freemusicarchive.org/music/Hum...) Deep Blue - Janne Hanhisuanto (https://soundcloud.com/jannehanhisuanto) Saw Slicing - Patternbased (https://soundcloud.com/patternbased) Heisse Luft - Thompson and Kuhl (https://soundcloud.com/phlow/05-x-com) miracle - slow (http://www.restingbell.net/releases/r) Tropico de Tauro - Sr. Aye https://soundcloud.com/sr-aye) New SpaceTime episodes every Wednesday! Hosted by Gabe Perez-Giz Made by Kornhaber Brown (www.kornhaberbrown.com)