SOLAR SYSTEM

Detailed explanation-1: -The dust and gases in a nebula are very spread out, but gravity can slowly begin to pull together clumps of dust and gas. As these clumps get bigger and bigger, their gravity gets stronger and stronger. Eventually, the clump of dust and gas gets so big that it collapses from its own gravity.

Detailed explanation-2: -The steps to nebular theory go as follows. Nebula becomes a solar nebula as a region within the cloud of gas and dust condenses into a core and forms a protostar. The condensing material could have been caused by a nearby supernova shockwave. The material surrounding the protostar collapses into an accretion disk.

Detailed explanation-3: -The center of the nebula begins to get hot and dense. Gravity causes light gases to move to the center while heavier materials and ice stay in outer areas. A protostar forms in the center of the nebula. Gravity causes light gases to move to the center while heavier materials and ice stay in outer areas.

Detailed explanation-4: -The solar nebula was the rotating, flattened disk of gas and dust from which the solar system originated  4.6 Ga ago (Figure 1).