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Benford, James and Gregory Benford, eds. Starship Century. Reno, NV: Lucky Bat Books, 2013. ISBN 978-1-939051-29-5.

“Is this the century when we begin to build starships?” So begins the book, produced in conjunction with the Starship Century Symposium held in May of 2013 at the University of California San Diego. Now, in a sense, we built and launched starships in the last century. Indeed, at this writing, eight objects launched from Earth are on interstellar trajectories. These are the two Pioneer spacecraft, the two Voyagers, the New Horizons Pluto flyby spacecraft, and its inert upper stage and two spin-down masses. But these objects are not aimed at any particular stars; they're simply flying outward from the solar system following whatever trajectory they were on when they completed their missions, and even if they were aimed at the nearest stars, it would take them tens of thousands of years to get there, by which time their radioactive power sources would be long exhausted and they would be inert space junk.

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