In the early stages of the solar system, a process was unfolding where tiny particles of dust began to collide with one another. These collisions caused the dust grains to accumulate and merge, gradually forming larger clusters. This phenomenon was crucial for the formation of celestial bodies within the solar system.
As these clumps continued to grow through the repeated collisions, they eventually reached a size significant enough to be classified as planetesimals. These early building blocks of planets played an essential role in shaping the structure of the solar system we know today.