KBOs

Kuiper Belt Objects, or KBOs, are objects found in the Kuiper Belt, a region of space ranging from 30 AU to 55 AU out from the Sun.The largest and best known of the KBOs is Pluto, an object recently demoted from planet to dwarf planet.The Kuiper Belt is considered to be the source of short-period comets, comets having a orbital period of less than 200 years.