VOA News 조회 수 148 추천 수 0 2014.11.26 05:38:50
For a really good look at the night sky, stay out of the city. Artificial light — from street lamps, buildings, signs and cars — diminishes visibility of the nighttime sky. VOA's Rosanne...
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원문출처 : http://www.youtube.com/watch?v=XJloUKvGTZA&feature=youtube_gdata