As you can see that website is very old looking lol

Pluto (pronounced /ˈpluːtoʊ/, from Latin: Plūto, Greek: Πλούτων), also designated 134340 Pluto, is the second-largest known dwarf planet in the Solar System (after Eris) and the tenth-largest body observed directly orbiting the Sun. Originally classified as a planet, Pluto is now considered the largest member[6] of a distinct region called the Kuiper belt.

Minor planet
category dwarf planet

There is a difference

If you if u consider it a planet there are other ones that also should be considered so infact it would be like 11 or 12 planets so either way your wrong

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