Out beyond the orbit of Neptune lies an expansive ring of ancient relics, dynamical enigmas, and possibly a hidden planet—or two.
The Kuiper Belt, a region of frozen debris about 30 to 50 times farther from the sun than the Earth is—and perhaps farther, though nobody knows—has been shrouded in mystery since it first came into view in the 1990s.
Over the past 30 years, astronomers have cataloged about 4,000 Kuiper Belt objects (KBOs), including a smattering of dwarf worlds, icy comets, and leftover planet parts. But that number is expected to increase tenfold in the coming years as observations from more advanced telescopes pour in. In particular, the Vera C.