Which explanation of the solar system best fits the observations of the planets and how they orbit the sun question 27 options: the gravity of a large, massive star passing the sun ripped off blobs of material from it that formed the planets. the planets formed at the center of a collapsing spinning cloud of gas and dust. the sun and planets formed from a collapsing spinning cloud of gas and dust. a comet hit the sun and sent off fragments that became the planets.