How Do Telescopes Work? | Earth Science

Greg Foot explains the inner workings of a telescope. Science has come a long way since the first two lens prototype invented back in 1608.
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1 http://www.space.com/21950-who-invent...
2 http://astro.uchicago.edu/vtour/insid...
3 http://www.gtc.iac.es/gtc/gtc.php
4 http://www.space.com/22505-worlds-lar...
5 https://www.nasa.gov/mission_pages/hu...
6 http://www.spitzer.caltech.edu/mission
7 https://kepler.nasa.gov/Mission/faq/#a4

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