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

In 1905, geologist Thomas Chrowder Chamberlin and astronomer Forest Ray Moulton proposed the Chamberlin–Moulton planetesimal hypothesis. This evolutionary theory suggested that the planets of our Solar System formed from materials pulled out from the Sun due to the gravitational pull during a close encounter with a passing star.