2017年6月21日 星期三

NASA Prepares for Aug. 21 Total Solar Eclipse with Live Coverage, Safety Information

For the first time in 99 years, a total solar eclipse will occur across the entire continental United States, and NASA is preparing to share this experience of a lifetime on Aug. 21.

June 21, 2017
from NASA http://ift.tt/2sAYxnN
via IFTTT

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