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.
Astronomer William Herschel is credited with the discovery of Uranus in 1781. He was using a telescope he built himself when he spotted a dim object.He watched it for years and determined it had to be a planet.stronomer William Herschel is credited with the discovery of Uranus in 1781. He was using a telescope he built himself when he spotted a dim object.