This artist concept shows NASA's Space Launch System, or SLS, which offers numerous benefits for scientific missions, from larger spacecraft mass to reduced travel time through the solar system in ... more 
This artist concept shows NASA's Space Launch System, or SLS, which offers numerous benefits for scientific missions, from larger spacecraft mass to reduced travel time through the solar system in route to other worlds. (Concept updated Jan. 14 less 
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SPACE.com | Photo By NASA
Wed, May 28, 2014 11:10 AM EDT