what are the 12 planets?

According to the modern classification of the Solar System, there are 8 planets, not 12. The International Astronomical Union (IAU) officially recognizes the following planets:

1. Mercury

2. Venus

3. Earth

4. Mars

5. Jupiter

6. Saturn

7. Uranus

8. Neptune

The idea of 12 planets comes from older proposals that included bodies such as Pluto, Ceres, Eris, Haumea, and Makemake. However, Pluto and similar objects are now classified as dwarf planets, not planets.

In simple terms: The Solar System currently has 8 officially recognized planets, while Pluto is classified as a dwarf planet.