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.
The nucleus is made up of nucleons (neutrons and protons) and it is located at the centre of an atom. Nucleus was discovered by British chemist and physicist Ernest Rutherford in the year 1911.He is known as the father of nuclear physics. In 1908, he won the Noble Prize for his achievements in chemistry.ucleus was discovered by British chemist and physicist Ernest Rutherford in the year 1911. He is known as the father of nuclear physics. In 1908, he won the Noble Prize for his achievements in chemistry.