Astronomy 101

Our planet is called Earth.
Planet Earth is as the map says.
Asia, Africa, North America, South America, Antarctica, Europe and Australia.
These collective continents are our planet.
Earth.

What if way beyond Antarctica there are more collective continents.
Many many more.
What would we call them.
Earth?
No
Planet earth is as we are told.
Its fixed and not open to interpretation.

We would called these planets
Mars
Jupiter
Venus
Saturn etc.

As we have been taught.
But beyond the frozen tundra of Antarctica and not in the sky.