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Finding Pluto Research Paper

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Finding Pluto’s Real Identity One of the most controversial and highly debated subjects in our solar system is whether Pluto should be classified as a planet. In 2006, Pluto was relegated from planet to dwarf planet. After a few years, the debate appeared to be settled. However, this past week when the New Horizons probe was set out to be the first spacecraft to visit Pluto new questions were raised. According to the International Astronomical Union (IAU), an object is considered a planet when it meets three criteria: it has to orbit the sun, be large enough that the force of its gravity pulls it into a spherical shape, and have "cleared the neighborhood around its orbit." In theory, an object that's large enough will clear its orbit either by collecting other debris with its gravity or by surviving impacts with the debris. …show more content…
As Pluto approaches perihelion, it reaches its maximum distance from the ecliptic due to its 17-degree inclination. Thus, it is far above or below the plane of Neptune's orbit. Therefore, Pluto and Neptune will not collide and will not approach closer than 18 A.U. to one another. This information would fall under the third criteria: “cleared the neighborhood around its orbit.” Carolyn Porco a planetary scientist known for her work in the exploration of the outer solar system stated “It is true even if you put the Earth or Mercury there they wouldn’t clear out their zone, but Earth or Mercury wouldn’t form there in the first place” (Video: Fast and Light to Pluto, New York Times). Although astronomers discovered Pluto decades before any of the other Kuiper belt objects (KBOs), they long assumed it was unique and called it a

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