The Mercator Telescope is based on the island of La Palma. Brady Haran takes a look inside. More about the telescope at http://www.mercator.iac.es/general/presentation Deep Sky Videos website: http://www.deepskyvideos.com/ Twitter: https://twitter.com/#!/DeepSkyVideos Facebook: http://www.facebook.com/DeepSkyVideos Flickr: http://www.flickr.com/photos/68847473@N02/ More about the astronomers in our videos: http://www.deepskyvideos.com/pages/contributors.html Videos by Brady Haran Editing in this film by Stephen Slater