SOLAR SYSTEM

Detailed explanation-1: -Not so long before the Sun is born, a protoplanetary disk is born. The disk is formed from dust particles and gasses leftover from the formation of the Sun. The dust condenses under gravity and becomes planetesimals about several kilometers in diameter.

Detailed explanation-2: -An accretion disk forms whenever the matter being accreted possesses enough rotational or angular momentum that it cannot simply fall inward toward the accretor along a straight line.

Detailed explanation-3: -A rotating disk of dust and gas that surrounds the core of a developing solar system. It may eventually develop into orbiting celestial bodies such as planets and asteroids.

Detailed explanation-4: -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.