The first step to knowledge—to finding the answer—is to eliminate what isn’t true. Thomas Edison, during his struggle to create the incandescent light bulb, performed thousands of unsuccessful trials. When reporters asked him what he thought about his lack of progress, he replied: “I haven’t failed. I’ve just found ten thousand ways that won’t work!”


Lunar Surface Rocket Scientist Lunar Orbit Unsuccessful Trial Parking Orbit 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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© Springer Science+Business Media, LLC 2007

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