SOLAR SYSTEM

Detailed explanation-1: -The nebular theory of planet formation suggests that the remaining material surround the newly ignited Sun would have accumulated into the planets. The accretion disk surrounding the Sun would have gravitationally accumulated into larger and larger bodies called planetesimals beginning some 4.5 billion years ago.

Detailed explanation-2: -Eventually, the clump of dust and gas gets so big that it collapses from its own gravity. The collapse causes the material at the center of the cloud to heat up-and this hot core is the beginning of a star.

Detailed explanation-3: -The core accretion model Gravity collapsed the material in on itself as it began to spin, forming the sun in the center of the nebula.

Detailed explanation-4: -Summary: Stars form in cold, dense regions of space called molecular clouds. When the force of gravity pulling in on the cloud is greater than the strength of internal pressure pushing out, the cloud collapses into a protostar.