It was perhaps a realisation that the antipathy between the two leaders was reaching damaging proportions and also maybe a hint that while still favouring the Republican presidential contender Mitt Romney, Mr Netanyahu has sampled the political mood in America and is re-balancing himself ahead of a possible second Obama victory.
But some theorists believe that when it is possible, they will be able to determine how a particular object formed by comparing its spectrum with that of its parent star to determine the relative proportions of heavy elements in the two bodies.