context: Oort Cloud (ing. Oort cloud) is an imaginary zone that orbits the Sun's orbit at a large distance outside the orbit of Pluto and outside the Kuiper belt. This zone is thought to consist of ice and dust particles with orbiting the Sun at distances ranging from 50,000 to 100,000 astronomical units or more (equivalent to 0.8 to 1.5 light years). The existence of this cloud is not confirmed so it is still a theoretical cloud. This theory was developed by the Dutch astronomer Jan Oort (1900 - 1992) who sought to explain the origins and pathways of astronauts occurring in the solar system. The Oort Cloud is expected to be the origin of long orbits, while those of short orbit are from the Kuiper Belt. [1]
question: By whom was the Oort Cloud discovered?
answers.text: Jan Oort