8 Responses. > 1  the Moon takes an elliptical path around the Earth. The planets make nearly elliptical orbits around the Sun, close enough for reasonable approximations, but the Moonâs Orbit around the Earth is sufficiently influenced by the Sun that it follows a path detectably different from an ellipse.
Quick Answer. In 1896, French scientist Antoine Henri Becquerel discovered radioactivity which was an early contribution to atomic theory. He discovered this phenomenon while experimenting with uranium and a photographic plate. Continue Reading.
In 1903, members of the French Academy of Sciences wrote a letter to the Swedish Academy in which they nominated the collective discoveries in the field of radioactivity made by Marie and Pierre Curie, as well as their contemporary Henri Becquerel, for the Nobel Prize in Physics.