MOFFETT FIELD, Calif.  NASA is preparing to launch a 3-D    printer into space next year, a toaster-sized game changer that    greatly reduces the need for astronauts to load up with every    tool, spare part or supply they might ever need.  
    The printers would serve as a flying factory of infinite    designs, creating objects by extruding layer upon layer of    plastic from long strands coiled around large spools. Doctors    use them to make replacement joints and artists use them to    build exquisite jewelry.  
    In NASA labs, engineers are 3-D printing small satellites that    could shoot out of the Space Station and transmit data to    earth, as well as replacement parts and rocket pieces that can    survive extreme temperatures.  
    Any time we realize we can 3-D print something in space, its    like Christmas, said inventor Andrew Filo, who is consulting    with NASA on the project. You can get rid of concepts like    rationing, scarce or irreplaceable.  
    The spools of plastic could eventually replace racks of extra    instruments and hardware, although the upcoming mission is just    a demonstration printing job.  
    If you want to be adaptable, you have to be able to design and    manufacture on the fly, and thats where 3-D printing in space    comes in, said Dave Korsmeyer, director of engineering at    NASAs Ames Research Center at Moffett Field, about 35 miles    south of San Francisco.  
    For the first 3-D printer in space test slated for fall 2014,    NASA had more than a dozen machines to choose from, ranging    from $300 desktop models to $500,000 warehouse builders.  
    All of them, however, were built for use on Earth, and space    travel presented challenges, from the loads and vibrations of    launch to the stresses of working in orbit, including    microgravity, differing air pressures, limited power and    variable temperatures.  
    As a result, NASA hired Silicon Valley startup Made In Space to    build something entirely new.  
    Imagine an astronaut needing to make a life-or-death repair on    the International Space Station, said Aaron Kemmer, CEO of    Made in Space. Rather than hoping that the necessary parts and    tools are on the station already, what if the parts could be    3-D printed when they needed them?  
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NASA preparing to send a 3D printer into space