The contraction of a gaseous cloud out of which a star and a planetary system form is caused by what kind of force?

Question

Quizplus · Accepted Answer

The force that causes the contraction of a gaseous cloud to form a star and planetary system is gravitational. The mutual attraction between the gas particles creates a force that causes them to be pulled together and become more densely packed, eventually leading to the formation of a star and planets.

The Contraction of a Gaseous Cloud Out of Which a Star