That's a good question! It's almost true, but not entirely. Here's the breakdown:

* Jupiter: Named after the Roman king of the gods, Jupiter.

* Saturn: Named after the Roman god of agriculture, Saturn.

* Uranus: Named after the Greek god of the sky, Uranus.

* Neptune: Named after the Roman god of the sea, Neptune.

* Pluto: While technically a dwarf planet now, it was named after the Roman god of the underworld, Pluto.

The exception: Pluto was the first planet discovered that wasn't named after a god. It was named after the Roman god of the underworld, but this choice was largely due to the fact that Pluto was a dim and distant world, symbolizing the underworld.

So, while it's common to think of the outer planets as all being named after gods, the naming of Pluto deviates from this tradition.