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

How do we know earth is the third planet away from the sun?

Which is the 3rd planet from the sun? - Quora

Incredibly Powerful Cosmic Ray With No Conventional Explanation

Lidunka Vočadlo Culture Online - UCL – University College London

What's the largest planet in the universe?

Lidunka Vočadlo Culture Online - UCL – University College London

Does Planet Earth Have a Mind of Its Own?

Why Some Americans Do Not See Urgency on Climate Change

This is Planet Earth isn't it? You know, the third planet from the

Is earth the 3rd planet or the 7th planet? - Quora

Why is Earth called 'Earth'? - BBC Sky at Night Magazine

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