In 1905, who concluded with Thomas Chamberlain that the planets of the Solar System originated from an encounter between the Sun and another star?

The correct option is Forest Moulton.

Explanation:

In 1905, American astronomer Forest Ray Moulton collaborated with geologist Thomas Chrowder Chamberlin to propose the Chamberlin–Moulton planetesimal hypothesis.

According to this hypothesis, the planets of the Solar System formed as a result of a near-collision or close encounter between the Sun and another passing star. The gravitational pull of the passing star pulled material out from the Sun, which cooled and condensed into small solid bodies called planetesimals. Over time, these planetesimals collided and accreted to form the planets.