Each pair of bodies in the Solar System has five Lagrangian points between them. (Space.com has a good review of our Solar System’s Lagrangian points. Search the site for “LaGrange Points.” Also see NASA Earth Observatory, EarthObservatory.nasa.gov.)
Sometime in this century, people will be flying autonomous aircraft—the equivalent of the self-driving car. Personal air vehicles, perhaps powered by electric batteries, can help relieve our overcrowded airports, save land, and minimize emissions.