NASA's Lunar Atmosphere and Dust Environment Explorer (LADEE) spacecraft is pictured orbiting near the surface of the moon, in this artist's illustration released by NASA on August 15, 2013. More than... more 
NASA's Lunar Atmosphere and Dust Environment Explorer (LADEE) spacecraft is pictured orbiting near the surface of the moon, in this artist's illustration released by NASA on August 15, 2013. More than 40 years after the last Apollo astronauts left the moon, NASA is preparing to launch the small LADEE robotic spacecraft to investigate one of their most bizarre discoveries, after crews reported seeing an odd glow on the lunar horizon just before sunrise. The phenomenon was unexpected because the airless moon lacked atmosphere for reflecting sunlight. The LADEE spacecraft is scheduled to be launched at 11:27 p.m. EDT on September 6, 2013 (0327 GMT September 7) from NASA's Wallops Flight Facility on Wallops Island, Virginia. REUTERS/Dana Berry/NASA Ames/Handout via Reuters (UNITED STATES - Tags: SCIENCE TECHNOLOGY) ATTENTION EDITORS ' THIS IMAGE WAS PROVIDED BY A THIRD PARTY. FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS. THIS PICTURE IS DISTRIBUTED EXACTLY AS RECEIVED BY REUTERS, AS A SERVICE TO CLIENTS less 
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Reuters | Photo By NASA / Reuters
Wed, Sep 4, 2013 7:04 PM EDT