The distant blue Earth is seen above the Moon's limb, in this handout picture taken by the Apollo 8 crew forty-five years ago, on December 24, 1968, courtesy of NASA. Frank Borman, James Lovell, and ... more 
The distant blue Earth is seen above the Moon's limb, in this handout picture taken by the Apollo 8 crew forty-five years ago, on December 24, 1968, courtesy of NASA. Frank Borman, James Lovell, and William Anders were launched atop a Saturn V rocket on December 21, 1968 circled the Moon ten times in their command module, and returned to Earth on December 27. The Apollo 8 mission's impressive list of firsts includes: the first humans to journey to the Earth's Moon, the first to fly using the Saturn V rocket, and the first to photograph the Earth from deep space. REUTERS/NASA/Handout via Reuters (UNITED STATES - Tags: SCIENCE TECHNOLOGY ENVIRONMENT) 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
Tue, Dec 24, 2013 10:14 AM EST