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.”
It is not a planet beacuse it didn't meet some of the requirements as shown :
1. is in orbit around the Sun,
2. sufficient mass to assume a nearly round shape, and
3. has "cleared the neighborhood" around its orbit. (This is what Pluto did NOT have.)
Among other things, this definition caused Pluto to no longer be classified as a planet, a change from how it had been widely considered until that point.
Answers & Comments
Answer:
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:
Pluto is a dwarf planet.
Step-by-step explanation:
It is not a planet beacuse it didn't meet some of the requirements as shown :
1. is in orbit around the Sun,
2. sufficient mass to assume a nearly round shape, and
3. has "cleared the neighborhood" around its orbit. (This is what Pluto did NOT have.)
Among other things, this definition caused Pluto to no longer be classified as a planet, a change from how it had been widely considered until that point.