SOLAR SYSTEM

Detailed explanation-1: -These planetesimal collisions cause the planetesimals to increase in size. Planetesimals eventually become planets after they are large enough to have a solid core and orbit. The planetesimal hypothesis suggests that planets form through the accretion of particles in the same orbit through collisions.

Detailed explanation-2: -This material is gradually pulled together by gravity to form small chunks. These chunks get larger and larger until they form planetesimals. Many of the objects break apart when they collide, but some continue to grow. Some of these planetesimals go on to become planets and moons.

Detailed explanation-3: -The Earth’s History is a History of Collisions Dust grains build up to form planetesimals, and planetesimals merge to form protoplanets. Watch the protoplanet shown in red, it collides and merges with another protoplanet.

Detailed explanation-4: -Accretion is the process where small particles of dust, gas, and ice collect and stick together gradually. Gravity attracts these particles together, and they continue to accumulate to form a larger mass.