# 10.13: The Oort Cloud and Kuiper Belt

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The Oort Cloud is a hypothesized spherical cloud of icy objects up to 50,000 AU from the sun. This spherical cloud is the primary source of long-period comets. No Oort Cloud objects have been found, to date. Any object within the Oort Cloud would be called an Oort Cloud Object, (OCO) . The Oort Cloud would represent the physical boundary of the solar system.

CC BY-SA 3.0 | Image courtesy of NASA and Wikimedia Author: Lexicon.

10.13: The Oort Cloud and Kuiper Belt is shared under a CC BY license and was authored, remixed, and/or curated by LibreTexts.