Question

how astronomer determined that Pluto was'nt a planet​

Answer 1

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:

please mark me as a brainliest