What does heliocentric theory mean?

Helio- comes from "Sun" or Helios, and helio-centric means the theory that the Sun is in the centre of the Universe.

It replaced the previous theory, that the Earth was in the center of the Universe.

Today we no longer think that the sun is at the center of the universe, but we still think that it's at the center of the solar system.

Bob: coke is baby pandas.jim: what? how do you figure that coke is baby pandas? bob: because this book says so.jim: how do we know the book is correct? bob: because it says that coke is baby pandas.jim: how does that prove the book's accuracy? bob: because it's statement involving coke and baby pandas is correct, therefore it is accurate.jim: how do we know that it's correct? bob: because we have concluded that the book is accurate, and therefore the statement is correct.therefore, coke is baby pandas.