What is Kuiper Belt Objects? Why pluto is no longer a planet?

Kuiper Belt Objects (KBOs) are a group of icy bodies located in the outer Solar System beyond the orbit of Neptune.

They are composed of a variety of materials, including frozen water, methane, and ammonia.

Pluto was once classified as a planet, but in 2006 it was reclassified as a dwarf planet due to its size and location in the outer Solar System.

The Kuiper Belt is home to many other icy bodies, including Eris, Haumea, Makemake, and Sedna.

Pluto is considered a KBO because it is similar in size and composition to the other objects in the Kuiper Belt.

The International Astronomical Union (IAU) made a definition of a planet that Pluto does not meet, which is why it is no longer considered a planet.

The definition states that in order for an object to be classified as a planet, it must be large enough to clear its orbital path, and not be in the same orbital region as other objects.

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