Why the Universe Needs Dark Energy

Part 2 in our Dark Energy series. Part 1: https://www.youtube.com/watch?v=xZTb6sfHEX8 Check out our sister channel Crash Course Physics to learn more about the basic foudations of Physics: https://www.youtube.com/watch?v=ZM8ECpBuQYE&list=PL8dPuuaLjXtN0ge7yDk_UA0ldZJdhwkoV Get your own Space Time t-shirt at http://bit.ly/1QlzoBi 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 Now that we know the universe will continue to expand forever, we can begin to complete the first Friedmann equation, and determine the shape and geometry of our universe. At first glance, it would seem that the equation doesn’t quite add up, and that our universe is a hyperbolic plane. But when we add in the cosmological constant, the equation balances out, and we return to a flat universe. _____________________ COMMENTS: Deiter Meena https://www.youtube.com/watch?v=xZTb6sfHEX8&lc=z13uzj2y2uf2xl3ck23zwfuxkqyzidsfh Jack W https://www.youtube.com/watch?v=xZTb6sfHEX8&lc=z13rih2gupnudr3x004cjbw4pyryezmi0ig Mychelly Goulart https://www.youtube.com/watch?v=xZTb6sfHEX8&lc=z13mzpkq3qauip1xw04cjvoxxsj1fhv5uac Tomek Wooff https://www.youtube.com/watch?v=xZTb6sfHEX8&lc=z12hxbtrbvezin5ra04cd3cyrou3fxk55o00k Mr B https://www.youtube.com/watch?v=xZTb6sfHEX8&lc=z13qfhkoclzqf11dx235d3zj0zucyjsxj04 ______________________ Written and hosted by Matt O’Dowd Made by Kornhaber Brown (www.kornhaberbrown.com)