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

Why Pluto is No Longer a Planet - Universe Today

Giant Planets Around Small Stars - Sky & Telescope - Sky & Telescope

New research shows the average human could survive long-term on

Solar System Nomenclature - Book Solar system unit, Solar system

Is life possible on Mars? - Big Think

Why some scientists think Pluto should be a planet again - Vox

Third Planet

Giant exoplanet found around tiny star shouldn't even exist

Introduction of Earth. Earth is the 3rd planet from the Sun…