Earth is seen in this image taken by NASA's JunoCam as it flew by Earth, using its gravity to get a boost needed to reach Jupiter on October 9, 2013, in this NASA handout image released to Reuters on ... more 
Earth is seen in this image taken by NASA's JunoCam as it flew by Earth, using its gravity to get a boost needed to reach Jupiter on October 9, 2013, in this NASA handout image released to Reuters on October 21, 2013. The Juno spacecraft was launched from NASA's Kennedy Space Center in Florida on August 5, 2011. Juno's rocket, the Atlas 551, was only capable of giving Juno enough energy or speed to reach the asteroid belt, at which point the Sun's gravity pulled Juno back toward the inner solar system. The Earth flyby gravity assist increases the spacecraft's speed to put it on course for arrival at Jupiter on July 4, 2016. REUTERS/NASA/JPL-Caltech/Malin Space Science Systems/Handout (OUTER SPACE - Tags: ENVIRONMENT 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 
1 / 29
Reuters | Photo By NASA / REUTERS
Mon, Oct 21, 2013 10:00 AM EDT