SOLAR SYSTEM

Detailed explanation-1: -When this dust cloud collapsed, it formed a solar nebula – a spinning, swirling disk of material. At the center, gravity pulled more and more material in. Eventually, the pressure in the core was so great that hydrogen atoms began to combine and form helium, releasing a tremendous amount of energy.

Detailed explanation-2: -It began to collapse in on itself after becoming gravitationally unstable. This was possibly because of a nearby supernova-an exploding star-sending shock waves rippling through space. Gravity then caused dust and gas to be continually tugged to the centre of the cloud, making its core very hot and dense.

Detailed explanation-3: -Within the solar nebula, scientists believe that dust and ice particles embedded in the gas moved, occasionally colliding and clumping together. Through this process, called “accretion, ‘’ these microscopic particles formed larger bodies that eventually became planetesimals with sizes up to a few kilometers across.

Detailed explanation-4: -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-5: -Collisions between particles converted this energy into heat (random motions). The solar nebula became hottest near the center where much of the mass was collected to form the protosun(the cloud of gas that became Sun).