Pluto Is Just One of Millions of Objects in the Kuiper Belt

When we're young children in school, many of us learn about the planets, the sun, and maybe the asteroid belt. There's much more to our solar system than that, though, including a region of the outer solar system called the Kuiper belt.
Sitting beyond the orbit of Neptune, the Kuiper (pronounced Ky-per) belt is home to millions (or billions, it's unclear) of icy objects that orbit our sun just like the planets and asteroids we know about. Here's how NASA puts it: "Similar to the asteroid belt, the Kuiper belt is a region of leftovers from the solar system's early history. Like the asteroid belt, it has also been shaped by a giant planet, although it's more of a thick disk (like a doughnut) than a thin belt."
Pluto Is Just One of Millions of Objects in the Kuiper Belt