The Kuiper Belt, located at the edge of the Solar System, is a vast collection of icy objects. It is believed to hold hundreds of thousands of objects, varying from small fragments to 100 km wide, potentially concealing over a trillion comets.

In contrast, the Oort Cloud is a spherical region that houses comets and various celestial bodies. Following Pluto's discovery in 1920, scientists speculated about objects beyond it, eventually leading to the identification of the Kuiper Belt in 1992 by tracking the movements of distant objects.