Astronomers define a planet as an object that orbits the sun (but not another object), is round (or nearly so) and has cleared the area around its orbit.
Why Pluto is No Longer a Planet - Universe Today
All planets can fit between the Earth & Moon : r/space
Why Pluto Isn't a Planet, but (Maybe) Should Be
Planet or dwarf planet: all worlds are worth investigating
What Pluto Retrograde 2024 Means For Your Zodiac Sign
If Pluto is not a planet, what is it? - Quora
Searching the Sky: Pluto, are you still there?
Pluto should be our ninth planet. A planetary scientist explains why - BBC Science Focus Magazine
Why Is Pluto Not a Planet? (teacher made) - Twinkl
Is Pluto a Planet? Some Scientists Think It Should Be.
Scientists decide Pluto's no longer a planet