Cosmoknowledge - Does the Oort Cloud exist?

However, these shadowed moon craters may not be as cold as the Oort cloud, a shell of icy space debris located way beyond the orbit of Neptune. The distinction depends on whether we include the Oort cloud when discussing the solar system. The Oort cloud is at once considered to be the “most distant region of our solar system” by NASA, but also “beyond” our solar system. This lack of clarity means it is sometimes regarded as part of the solar system, and at others defined as the boundary between