What is the surface on the orrt cloud?

The Oort Cloud is a theoretical region of icy bodies that exists at the outer edges of the solar system, extending roughly 2,000 to 100,000 astronomical units from the Sun. It is not a solid surface but rather a vast, spherical shell composed of comets and other icy objects that are believed to be remnants from the early solar system. The Oort Cloud is thought to be a source of long-period comets that occasionally enter the inner solar system. Its existence has not been directly observed, but it is inferred from the behavior of comets.