Solar System/Trans-Neptunian objects

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Trans-Neptunian objects, as their name suggests, are objects in the solar system that are farther from the Sun than the outermost planet, Neptune. The most famous of these, and the first discovered, is Pluto. Any trans-Neptunian dwarf planet is called a plutoid. Pluto is in the Kuiper belt of objects that begins immediately beyond the orbit of Neptune. Overlapping and beyond the Kuiper belt is the scattered disc, and far beyond the Kuiper belt is the Oort cloud. The Kuiper Belt is the source of short-period comets, and the Oort Cloud is the source of long-period comets.


Pluto, a dwarf planet in the Kuiper belt

Makemake, a dwarf planet in the Kuiper Belt

Haumea, a dwarf planet in the Kuiper Belt

Eris, a dwarf planet in the scattered disc

Sedna, a candidate dwarf planet in the scattered disc or the Oort Cloud