Will the Universe continue to expand outward or will it succumb to gravity and collapse upon itself? Find out in this episode of Space Time. Help us win a Webby Award by voting here: pv.webbyawards.com/2016/online-film-video/video-channels-and-networks/science-education Get your own Space Time t-shirt at bit.ly/1QlzoBi Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Comment on Reddit: www.reddit.com/r/pbsspacetime Throughout history, there has been much speculation about what the fate of the universe would be. Many theorized that the universe would eventually succumb to the pull of gravity, and reverse its expansion in what was being called ‘The Big Crunch.’ However, with the help of mathematical equations from Newton, Einstein, and Alexander Friedmann, we now have an answer. Special thanks to NAOJ and the European Southern Observatory for allowing usage of their photo of M83: apod.nasa.gov/apod/ap151008.html Flourine production in lower mass stars: phys.org/news/2014-08-toothpaste-fluorine-stars.html _____________________ Correction: escape velocity = square root of (2GM/r) - we accidentally left out the 2 _____________________ COMMENTS: Henrique Rigitano www.youtube.com/watch?v=6yLGeviU8FM&lc=z12menfxkpjnwfkfw23ehh4jwmqgst3ag04 ReVenGe TheRedFireFox [deleted] Richard van der Linden www.youtube.com/watch?v=6yLGeviU8FM&lc=z13vglqyqzz4zbljq04cfthoqynjxhpwer00k Mason Glaves www.youtube.com/watch?v=6yLGeviU8FM&lc=z12cgzexssvbzb5ls23csfyq4papudwco Rod Landaeta www.youtube.com/watch?v=6yLGeviU8FM&lc=z13icr0jtzzqj5ro304cjjmbnpqstrnx52c ______________________ Written and hosted by Matt O’Dowd Made by Kornhaber Brown (www.kornhaberbrown.com)

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