Pluto was reclassified and is no longer considered a planet because it does not clear what?

Pluto was reclassified from a planet to a "dwarf planet" in 2006 primarily because it does not clear its neighborhood around its orbit. This criterion is part of the International Astronomical Union’s definition of a planet. To be considered a planet, an object must orbit the Sun, be spherical due to its own gravity, and have cleared its orbital zone of other debris. Pluto shares its orbital region with other objects in the Kuiper Belt and is unable to dominate its vicinity, which is why it does not meet this specific criterion for planet status.

The term "clearing its neighborhood" refers specifically to an object’s gravitational influence in its orbital path, allowing it to either absorb or eject other objects that share its orbital area. Thus, while it may be in orbit around the Sun, without this ability to clear its neighborhood of smaller bodies, Pluto does not fulfill all the requirements to be considered a planet according to the current astronomical classification.