LINKS
http://visibleearth.nasa.gov/view.php?id=76261
http://www.jpl.nasa.gov/edu/teach/activity/pi-in-the-sky-3/
http://earthsky.org/astronomy-essentials/how-far-is-a-light-year
1.11 min https://www.youtube.com/watch?v=XGJ-RZglvKo
Flat Earth PROOF Nasa's SunBeams are STRAIGHT and fraudilant
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