Readers have asked me if the “L4” and “L5” nodes in my ebook Glitch are real. Yes, indeed. They are Lagrange (or Lagrangian) points. Wikipedia has a technical article http://bit.ly/Dt8x on these nifty results of gravity in our solar system – places where meteors, debris, or spacecraft can maintain a stable position using only the force of gravity.
Try Jake Turk http://bit.ly/1c7PIkv for a narrative combination of history and physics. NASA already uses Lagrange points in space missions, so now you can watch for references to Lagrange points in the news