The 3 Ks - Kuiper Belt, Koronis Asteroids & Karin Cluster

This article deals with three very interesting celestial objects that are not stars, planets or moons. To make things even more interesting, they all start on letter ‘K’, therefore, they can be referred to as the 3 Ks:

The Kuiper belt got its name after the renowned Dutch American astronomer and planetary scientist Gerard Kuiper (1905-1973). Although he didn’t formally discover this circumstellar disk in the most distant region of the Solar System, he played an important role in the modern planetary science. The Belt was discovered only in the 1980s, more than a decade after Kuiper’s death.