Should these considerations prove correct, the two conditions mentioned suggest that the Planck constant has not the meaning of a universal physical ... case of Bohr's atom model, the principal ...

Rice University physicists have gone to extremes to prove that Isaac Newton's classical laws of motion can apply in the atomic world: They've built an accurate model of part of the solar system inside ...

Researchers from ETH Zürich have announced they have been able to date events in the early solar system with greater precision than ever before possible using an extinct atom called niobium-92.