Planetesimal Hypothesis

The Planetesimal Hypothesis of Chamberlin (1905): Introduction

Overview of the Planetesimal Hypothesis of Chamberlin (1905), detailing the theory's introduction, core concepts, and outcomes. Learn about the interaction between the Proto-Sun and an Intruding Star, and how this hypothesis explains the origin of the Earth, its structure, atmosphere, and the formation of continents and ocean basins.

• The Planetesimal Hypothesis of Chamberlin (1905) belongs to the dualistic concepts of the origin of the Earth.
• According to Chamberlin, there were initially two heavenly bodies (stars) in the universe:
  • Proto-Sun
  • Its Companion Star or Intruding Star
• The behavior and properties of the Proto-Sun were unlike other stars; it was formed of very small particles which were cold and solid.

Theory

• When the Intruding Star came very close to the Proto-Sun, an infinite number of small particles were detached from the outer surface of the Proto-Sun due to the massive gravitational pull exerted by the giant Intruding Star.
• This matter, composed of dust, gases, and rock fragments, eventually accreted, forming planets and other celestial bodies that revolve around the Proto-Sun.

Outcome

• The Planetesimal Hypothesis not only explains the origin of the Earth but also sheds light on:
  • The structure of the Earth
  • The origin of its atmosphere
  • The formation of continents and ocean basins