Asked by Lilliana
Which of the following is not an accurate reason why Pluto was classified as a dwarf planet?
Which of the following is not an accurate reason why Pluto was classified as a dwarf planet?
Pluto is still a planet, but is not a part of the International Astronomical Union.
New technology allowed astronomers to compare Pluto to other dwarf planets.
With new technology, astronomers were able to submit a better definition of what a planet is.
Pluto does not have enough mass to clear its orbit from other debris.
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Answer: "Pluto is still a planet, but is not a part of the International Astronomical Union." — this is not an accurate reason.
Why: The IAU is an organization of astronomers, not an object that a planet can or cannot "be part of." Pluto was reclassified in 2006 because the IAU adopted a formal definition of "planet" (prompted by new discoveries and better observations of Kuiper Belt objects like Eris) and Pluto fails the IAU criterion of having cleared its orbital neighborhood. The other three options summarize the actual reasons for the reclassification.
Why: The IAU is an organization of astronomers, not an object that a planet can or cannot "be part of." Pluto was reclassified in 2006 because the IAU adopted a formal definition of "planet" (prompted by new discoveries and better observations of Kuiper Belt objects like Eris) and Pluto fails the IAU criterion of having cleared its orbital neighborhood. The other three options summarize the actual reasons for the reclassification.
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