Telescopes: Crash Course Astronomy #6

Today Phil explains how telescopes work and offers up some astronomical shopping advice.

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How Telescopes Work 1:07
Refractors vs Reflectors 2:50
Technology and the Light Spectrum 7:45

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PHOTOS/VIDEOS
http://en.wikipedia.org/wiki/G....alileo_Galilei#media
http://en.wikipedia.org/wiki/H....uman_eye#mediaviewer
http://en.wikipedia.org/wiki/R....efracting_telescope#
http://commons.wikimedia.org/w....iki/File:Positive_le
http://www.eso.org/public/imag....es/yb_vlt_moon_cnn_c
http://en.wikipedia.org/wiki/J....upiter#mediaviewer/F
http://en.wikipedia.org/wiki/W....ide_Field_and_Planet
http://commons.wikimedia.org/w....iki/File:Prime_focus
http://commons.wikimedia.org/w....iki/File:Inspection_
https://www.youtube.com/watch?....v=ui6ernRFxOg#t=2m22
http://en.wikipedia.org/wiki/W....illiam_Herschel#medi
http://commons.wikimedia.org/w....iki/File:Grand_Canyo
http://commons.wikimedia.org/w....iki/File_talk:EM_spe
https://www.youtube.com/watch?....v=RqX9vLj3_7w#t=4m52
http://pprc.qmul.ac.uk/~still/....wordpress/?page_id=1
http://en.wikipedia.org/wiki/V....ERITAS#mediaviewer/F
http://en.wikipedia.org/wiki/A....strophotography#medi
http://en.wikipedia.org/wiki/A....strophotography#medi
http://en.wikipedia.org/wiki/F....ile:PIA18593-Mars-Co
http://en.wikipedia.org/wiki/F....ile:NASA-HS201427a-H
http://upload.wikimedia.org/wi....kipedia/commons/2/2b
http://upload.wikimedia.org/wi....kipedia/commons/thum
http://upload.wikimedia.org/wi....kipedia/commons/5/56
http://hubblesite.org/newscent....er/archive/releases/