Telescopes: Crash Course Astronomy #6

Today Phil explains how telescopes work and offers up some astronomical shopping advice.Check out the Crash Course Astronomy solar system poster here: http://store.dftba.com/products/crashcourse-astronomy-poster--Chapters:Introduction 00:00How do Telescopes Work? 0:47Refraction 2:50Magnification 3:48Resolution 4:28Reflectors 5:19What Kind of Telescope Should You Buy? 6:19Technology and the Light Spectrum 7:45Review 11:14--Crash Course is on Patreon! You can support us directly by signing up at http://www.patreon.com/crashcourse--PBS Digital Studios: http://youtube.com/pbsdigitalstudiosFollow Phil on Twitter: https://twitter.com/badastronomerCrash Course is on Patreon! You can support us directly by signing up at http://www.patreon.com/crashcourseWant to find Crash Course elsewhere on the internet?Facebook - http://www.facebook.com/YouTubeCrashCourseTwitter - http://www.twitter.com/TheCrashCourseInstagram - https://www.instagram.com/thecrashcourse/CC Kids: http://www.youtube.com/crashcoursekids--PHOTOS/VIDEOShttp://en.wikipedia.org/wiki/Galileo_Galilei#mediaviewer/File:Justus_Sustermans_-_Portrait_of_Galileo_Galilei,_1636.jpghttp://en.wikipedia.org/wiki/Human_eye#mediaviewer/File:Human_eye_with_blood_vessels.jpghttp://en.wikipedia.org/wiki/Refracting_telescope#mediaviewer/File:Refractor_Cincinnati_observatory.jpghttp://commons.wikimedia.org/wiki/File:Positive_lens_2.svghttp://www.eso.org/public/images/yb_vlt_moon_cnn_cc/http://en.wikipedia.org/wiki/Jupiter#mediaviewer/File:Jupiter_MAD.jpghttp://en.wikipedia.org/wiki/Wide_Field_and_Planetary_Camera#mediaviewer/File:Hubble_Images_of_M100_Before_and_After_Mirror_Repair_-_GPN-2002-000064.jpghttp://commons.wikimedia.org/wiki/File:Prime_focus_telescope.svghttp://commons.wikimedia.org/wiki/File:Inspection_of_the_primary_mirror_of_the_Hubble_Space_Telescope8218871.jpghttps://www.youtube.com/watch?v=ui6ernRFxOg#t=2m22shttp://en.wikipedia.org/wiki/William_Herschel#mediaviewer/File:William_Herschel01.jpghttp://commons.wikimedia.org/wiki/File:Grand_Canyon_National_Park,_23_Annual_Star_Party_2013_-_0082_-_Flickr_-_Grand_Canyon_NPS.jpghttp://commons.wikimedia.org/wiki/File_talk:EM_spectrum.svg#mediaviewer/File:EM_spectrumrevised.pnghttps://www.youtube.com/watch?v=RqX9vLj3_7w#t=4m52shttp://pprc.qmul.ac.uk/~still/wordpress/?page_id=138http://en.wikipedia.org/wiki/VERITAS#mediaviewer/File:MMT_FLWO_Amado_AZ_10359.jpghttp://en.wikipedia.org/wiki/Astrophotography#mediaviewer/File:Henry_Drape_Orion_nebula_1880_inverted.jpghttp://en.wikipedia.org/wiki/Astrophotography#mediaviewer/File:Orion-Nebula_A_A_Common.jpghttp://en.wikipedia.org/wiki/File:PIA18593-Mars-CometSidingSpring-NEOWISE-20140728.jpghttp://en.wikipedia.org/wiki/File:NASA-HS201427a-HubbleUltraDeepField2014-20140603.jpghttp://upload.wikimedia.org/wikipedia/commons/2/2b/Jupiter_and_its_shrunken_Great_Red_Spot.jpghttp://upload.wikimedia.org/wikipedia/commons/thumb/5/58/Chromatic_aberration_3.svg/2000px-Chromatic_aberration_3.svg.pnghttp://upload.wikimedia.org/wikipedia/commons/5/56/The_Whirlpool_Galaxy_%28M51%29.jpghttp://hubblesite.org/newscenter/archive/releases/2005/12/image/a/