SOLAR SYSTEM

Detailed explanation-1: -1951: Astronomer Gerard Kuiper predicts the existence of a belt of icy objects just beyond the orbit of Neptune. 1992: After five years of searching, astronomers David Jewitt and Jane Luu discover the first KBO, 1992QB1.

Detailed explanation-2: -Both Arrokoth (visited by NASA’s New Horizons mission) and Pluto are in the Kuiper Belt – a donut-shaped region of icy bodies beyond the orbit of Neptune.

Detailed explanation-3: -They often describe scattered disc objects as “scattered Kuiper belt objects". Eris, which is known to be more massive than Pluto, is often referred to as a KBO, but is technically an SDO.

Detailed explanation-4: -The Kuiper Belt consists of myriad worlds with average orbital distances of about 30 to 50 AU from the Sun-that is, beyond the orbit of Neptune. Pluto’s orbit is within the Kuiper Belt and has a special relationship to Neptune’s orbit; namely, Pluto makes two trips around the Sun for every three Neptune orbits.