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        "description": "<p>August 4, 2011\u2014NASA's Juno spacecraft is headed on a five-year journey  to the solar system's largest planet, Jupiter. Along the way, the probe  will use Earth to \"slingshot\" itself toward the gas giant planet.</p>", 
        "is_us_only": "false", 
        "title": "NASA Probe to Explore Jupiter", 
        "url": "http://video.nationalgeographic.com/video/news/space-technology-news/nasa-juno-spacecraft-vin/", 
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            "link": [
                {
                    "url": "http://science.nationalgeographic.com/science/space/solar-system/jupiter-article/", 
                    "name": "Jupiter Facts, Photos, and More"
                }, 
                {
                    "url": "http://news.nationalgeographic.com/news/2008/12/081204-jupiter-core-juno.html", 
                    "name": " New Model of Jupiter's Core Ignites Planet Birth Debate"
                }
            ]
        }, 
        "credit": " 2011 National Geographic; video courtesy NASA/JPL-Caltech", 
        "smil": "http://video.nationalgeographic.com/video/player/data/xml/nasa-juno-spacecraft-vin.smil", 
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        "transcript": "<p class=\"MsoNormal\">Even though NASA\u2019s human space flight program has been cut back, its <em>unmanned</em> programs are forging ahead.</p><p class=\"MsoNormal\">This month, NASA is launching the Juno spacecraft aboard an Atlas Five rocket, headed to the solar system\u2019s largest planet- Jupiter.</p><p class=\"MsoNormal\">For the most part Jupiter remains a mystery.</p><p class=\"MsoNormal\">SOUNDBITE: Steve Matousek, Juno Proposal Mgr., NASA Jet Propulsion Laboratory</p><p class=\"MsoNormal\">\u201cWhen I first started working on Juno, it blew me away that we knew so little about the biggest planet in the solar system. For example, we don\u2019t know what the core is made out of. Why is the magnetic field so large, and so powerful? And how far down do the clouds go?\u201d</p><p class=\"MsoNormal\">\u201cWhen we fly by close on Juno and start getting that science data back, we\u2019ll be able to answer those questions.\u201d</p><p class=\"MsoNormal\">To get to Jupiter, the Juno spacecraft will be fueled by solar power, and while on its orbit around the sun will get a push from earth.</p><p class=\"MsoNormal\">SOUNDBITE: Jan Chodas, Juno Project Manager, NASA Jet Propulson Laboratory</p><p class=\"MsoNormal\">\u201cOn the Juno mission, we initially launch from the earth, we fly out past the asteroid belts. We do a burn at that point, to bring ourselves back in towards the earth, and we use what we call a gravity assist , or kind of a slingshot of the earth\u2019s gravity well to then propel us out towards Jupiter.\u201d</p><p class=\"MsoNormal\">It will take 5 years for Juno to reach the big planet, but once there, the spacecraft will orbit its poles 33 times.  Its instruments will measure the amount of water and ammonia in the atmosphere, as well as map the atmosphere, auroras and interior.</p><p class=\"MsoNormal\">Maybe by the end of 2016, scientists will have a better understanding of Jupiter\u2019s now-unknown core, and the planet\u2019s origin.</p>", 
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