The Oort Cloud is a predicted collection of icy objects farther away than everything else in the solar system. It fits with observations of comets in the planetary region of the solar system, but scientists have yet to observe any object in the Oort Cloud itself. The Oort cloud sometimes called the Öpik–Oort cloud, first described in 1950 by the Dutch astronomer Jan Oort, is a theoretical concept of a cloud of predominantly icy planetesimals proposed to surround the Sun at distances ranging from 2,000 to 200,000 AU.
Unlike the orbits of the planets and the Kuiper Belt, which are pretty flat like a disk, the Oort Cloud is a spherical shell surrounding everything in our solar system. It's like a bubble with a thick shell. The Oort Cloud is made up of icy pieces of space debris