This undated artist's concept depicts NASA's Voyager 1 spacecraft entering interstellar space, or the space between stars. NASA's Voyager 1 spacecraft is officially the first human-made object to ... more 
This undated artist's concept depicts NASA's Voyager 1 spacecraft entering interstellar space, or the space between stars. NASA's Voyager 1 spacecraft is officially the first human-made object to venture into interstellar space, according to a NASA statement. The 36-year-old probe is about 12 billion miles (19 billion kilometres) from our sun. REUTERS/NASA/JPL-Caltech/Handout (UNITED STATES - Tags: SCIENCE TECHNOLOGY) THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY. IT IS DISTRIBUTED, EXACTLY AS RECEIVED BY REUTERS, AS A SERVICE TO CLIENTS. FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS less 
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Reuters | Photo By NASA / Reuters
Thu, Sep 12, 2013 3:21 PM EDT