Should Pluto have been reclassified as a ‘dwarf planet’?

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.”

cirrus clouds: lacy or wispy clouds that form at high altitudes it would generally happen before a change in the weather.

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