That's wrong. That's terribly wrong. Nothing Samus does is related to Earth. She was born and lived on the planet K-12. Every mission revolves around a different planet. Tallon IV. Zebes.
Nah no need to be sorry. But as a Metroid freak myself, it's basic knowledge. Ridley killed everyone on K-12 and left, Chozo developed armor and trained her when she was 12 years old.