Question

Planetesimal hypothesis was propounded by

Answer 1

Planetesimal Hypothesis. Planetesimal Hypothesis, a theory of the origin of the solar system. It was proposed by Forrest R. Moulton and Thomas C. Chamberlin about 1900. The theory states that the planets were formed by the accumulation of extremely small bits of matterplanetesimalsthat revolved around the sun.

Answer 2

The planetesimal hypothesis was proposed by Chamberlain and Moulton in 1904.

Explanation:

• The planetesimal hypothesis was proposed by Chamberlain and Moulton in 1904.

The main points of this hypothesis are as follows:-

• The sun existed before the formation of planets.
• A passing star approached very close to sun.

• Due to the disruptive forces of the sun and the strong gravitational pull of the passing star, giant masses of gas were torn from the surface of the pre-existing sun.

• The giant masses of gas broke into a large number of small chunks which on cooling gave rise to solid particles,called planetesimals.

• The planetesimals started flying as cold bodies into orbits around the sun in the plane of the passing star.

• By collision and gravitational attraction,the larger planetesimals swept up the smaller pieces and thus planets were forced.