Tucked away in a valley in the Allegheny Mountains in West Virginia, is this: the Green Bank Radio Telescope, the largest steerable radio telescope in the world. And there are some rather special rules for the area around it... Thanks to Justin Richmond-Decker and Mike Holstine at the National Radio Astronomy Observatory in Green Bank for inviting me over and letting us film at the Telescope on one of their maintenance days! For more about the Green Bank Observatory: https://science.nrao.edu/facilities/gbt Want a tour? You can! (Although you won't be allowed up the telescope!) https://greenbankobservatory.org/visit/ On camera, thanks to MATT GRAY: null - http://twitter.com/unnamedculprit - http://mattg.co.uk/ And thanks to DAN W: http://twitter.com/iamdanw And edited by Michelle Martin: http://twitter.com/mrsmmartin ! I'm at http://tomscott.com/ on Twitter at http://twitter.com/tomscott on Facebook at http://facebook.com/tomscott and on Instagram and Snapchat as @tomscottgo