Why is Earth the third planet, shouldn't it be the first?

Why is the Earth called the third planet? - Quora

Why did they tell us that we are the 3rd planet from the Sun, and

Life in Our Solar System? Meet the Neighbors – Exoplanet

Third Planet

Can Lucky Planets Get a Second Chance at Life?

Why Pluto is No Longer a Planet - Universe Today

Bad Astronomy “Orbit-clearing” planet definition calculated by

A Year Throughout The Solar System - Astronomicca

Earth: A Primer on the Third Rock From the Sun

Fighting flat-Earth theory – Physics World

Strange things are happening with the solar system's rings

Earth Facts, Astronomy Facts

The evolution of what we define as planets. See the comments for