I learned that they were called
Mercury
Venus
Earth
Mars
Jupiter
Saturn
Uranus
Neptune
Pluto
Who taught you those names? :-P
We have way more than 9 planets now.
We have a new category... dwarf planets and Pluto is the lead planet.
“Pluto (minor planet designation: 134340 Pluto) is a dwarf planet in the Kuiper belt, a ring of bodies beyond Neptune. It was the first Kuiper belt object to be discovered.”
Then there are:
Ceres
Makemake
Haumea
Eris
“The term dwarf planet was adopted in 2006 as part of a three-way categorization of bodies orbiting the Sun,[1] brought about by an increase in discoveries of objects farther away from the Sun than Neptune that rivaled Pluto in size, and finally precipitated by the discovery of an even more massive object, Eris.[2] The exclusion of dwarf planets from the roster of planets by the IAU has been both praised and criticized; it was said to be the “right decision” by astronomer Mike Brown,[3][4][5] who discovered Eris and other new dwarf planets, but has been rejected by Alan Stern,[6][7] who had coined the term dwarf planet in April 1991.[8]”