Discussing the (recently successful) LISA Pathfinder and the planned eLISA mission. Lagrange Points video: https://youtu.be/mxpVbU5FH0s LIGO video: https://youtu.be/hIgZG7A1fqc LISA Pathfinder: http://sci.esa.int/lisa-pathfinder/ Reddit discussion for this video: https://redd.it/53h1az Black Hole videos: http://bit.ly/Black_Hole_Videos Visit our website at http://www.sixtysymbols.com/ We're on Facebook at http://www.facebook.com/sixtysymbols And Twitter at http://twitter.com/sixtysymbols This project features scientists from The University of Nottingham http://bit.ly/NottsPhysics Patreon: https://www.patreon.com/sixtysymbols Sixty Symbols videos by Brady Haran http://www.bradyharanblog.com Email list: http://eepurl.com/YdjL9