Sixty Symbols - Earth's Radius (and exoplanets)

The Earth's radius is often quoted when describing the size of exoplanets, such as those recently discovered by the Kepler telescope. Why? and other interesting bits about the discovery of planets outside our solar system.
siftbotsays...

Tags for this video have been changed from 'sixty symbols, earth, radius, astronomy' to 'sixty symbols, earth, radius, astronomy, occultation' - edited by choggie

choggiesays...

Like, I can totally relate to other celestial bodies an'shit when considering the size of my own, dude...you haven't crawled until you've walked in the sun, maaaan..

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