원문출처 : http://rss.cnn.com/c/35494/f/676993/s/4ea4d0f6/sc/32/l/0Ledition0Bcnn0N0C20A160C0A30C310Ctech0Clasers0Ehide0Eearth0Ealiens0Eastronomers0Eirpt0Cindex0Bhtml0Deref0Fedition/story01.htm