Why pluto is not a planet?

Pluto is not considered a planet because of its size, location, and characteristics. In 2006, the International Astronomical Union (IAU) redefined the definition of a planet, and Pluto did not meet the criteria.

1. Size:

According to the IAU's definition, a planet must "clear its orbit," meaning it has enough gravitational force to dominate its orbit and remove or attract other objects. Pluto shares its orbit with other objects in the Kuiper Belt, so it does not meet this criterion.

2. Location:

Pluto is located in the Kuiper Belt, a region beyond Neptune that contains numerous small icy bodies. It is not in the same category as the eight planets in our solar system, which orbit the Sun in a more defined and clear path.

3. Characteristics:

Pluto's composition and characteristics are more similar to other objects in the Kuiper Belt, such as dwarf planets and asteroids, rather than the traditional planets. It is relatively small, has an eccentric orbit, and is composed mainly of ice and rock.

Based on these factors, the IAU classified Pluto as a "dwarf planet" rather than a full-fledged planet. This reclassification was done to provide a more precise and scientific definition of what constitutes a planet.

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