"In this work new uses of Heisenberg's ideas are found. When superimposed with the equivalence principle of general relativity, they lead to quantum mechanical treatment of observed resonances in the Solar system. To test correctness of our theoretical predictions the number of allowed stable orbits for planets and for equatorial stable orbits of satellites of heavy planets is calculated resulting in surprisingly good agreement with observational data."
The first part of the paper is an excellent outline of the modern form of Heisenberg's honeycomb quantum mechanics along with an historical account of its motivation. Happy reading.
Update: Matti Pitkanen has some comments about the paper.