Clyde Tombaugh
KBOs are sometimes called "kuiperoids", a name suggested by Clyde Tombaugh. The term "trans-Neptunian object" (TNO) is recommended for objects in the belt by several scientific groups because the term is less controversial than all others—it is not an exact synonym though, as TNOs include all objects orbiting the Sun past the orbit of Neptune, not just those in the Kuiper belt.