Question

When was pluto officially mentioned as a dwarf planet?
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Answer 1

Answer:

August 2006

Explanation:

The International Astronomical Union (IAU) downgraded the status of Pluto to that of a dwarf planet because it did not meet the three criteria the IAU uses to define a full-sized planet. Essentially Pluto meets all the criteria except one—it “has not cleared its neighboring region of other objects.”

Answer 2

Answer:

In August 2006 the International Astronomical Union (IAU) downgraded the status of Pluto to that of “dwarf planet.”

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