Kuiper Belt Objects…What Are They?

Kuiper Belt Objects are unique in that they have different compositions than most asteroids and different orbits than most comets. This has led astronomers to contemplate the identity of Kuiper Belt Objects. Surprisingly, the answer isn’t so clear. Asteroids are mostly composed of rock while comets are mostly composed of rock and ice. Most Kuiper Belt Objects are composed of half rock and half ice, so in this respect, they might be considered comets. Nevertheless, it is believed that some comets can actually turn into asteroids as they lose their ice from passing close to the Sun. It is also worth noting that comets that come close to the Sun have elliptical orbits while most Kuiper Belt Objects have circular orbits that don’t come close to the Sun at all. This is why many have concluded that Kuiper Belt Objects are simply an icy asteroid belt. However, then we enter the issue of whether the larger Kuiper Belt Objects should be classified as dwarf planets. Our knowledge of the universe has expanded rapidly in just a few decades, and we have realized that our universe and all the objects and worlds within it are more complex than we initially believed. Maybe it’s time to update our classification system or accept that many, if not most, objects in our universe fall somewhere in between the categories we have created.


Kuiper Belt



Kuiper Belt Objects

Comets, Meteors, and Asteroids