Astronomers use the principle of parallax to measure distances to the closer stars. Here, the term parallax is the semi-angle of inclination between two sight-lines to the star, as observed when the Earth is on opposite sides of the Sun in its orbit.
Ernest Rutherford discovered that atoms contain mostly empty space, with his gold foil experiment. Bhor discovered that the electrons are not randomly placed around the nucleu â¦ s.
(yÄn'zÉn) German physicist who, with Maria Goeppert-Mayer, developed a model of the atomic nucleus that explained why certain nuclei were stable and had an unusual number of stable isotopes. For this work, Jensen and Goeppert-Mayer shared the 1963 Nobel Prize for physics with American physicist Eugene Wigner.