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.
Relevance. Rating Newest Oldest. Best Answer: Niels Bohr put forward his picture of the atom in 1913. He used Max Plank's quantum theory and suggested that electrons can have only certain amounts of energy, and their orbit can have onlt certain radii and that the electrons which absorb photons move to higher orbits.