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.
Neon: historical information. Neon was discovered by Sir William Ramsay, Morris W. Travers at 1898 in London, England. Neon was discovered by Sir William Ramsay and Morris Travers in 1898 very shortly after their discovery of the element krypton. Both elements were discovered through work on liquid air.