What is the formal name often used for what is commonly called the planetesimal theory?

Answer

Planetesimal hypothesis

While often used interchangeably in general discussion, the term 'planetesimal hypothesis' is cited as the more formal designation for the concept underlying the planetesimal theory. In scientific discourse where these ideas originated, the term 'hypothesis' often implied a foundational proposal requiring further rigorous verification, differentiating it slightly from a fully established 'theory' in common language. Understanding this semantic distinction is key when reviewing historical scientific literature concerning the origins of the solar system.

What is the formal name often used for what is commonly called the planetesimal theory?
astronomyplanet formationplanetesimal theory