planetogenesi
Planetogenesis, or planet formation, is the process by which planets emerge from the gas and dust of a protoplanetary disk surrounding a young star. The basic framework posits that a rotating disk forms as a molecular cloud collapses, with solid particles growing from micron-sized grains into kilometer-sized planetesimals and, through a series of mergers and accretions, into protoplanets and eventually mature planets.
Two leading mechanisms are debated: core accretion and disk instability. In the core accretion model, dust grains
Planet growth proceeds through stages: coagulation of small grains, formation of planetesimals, runaway and oligarchic growth
Observational evidence includes protoplanetary disks with rings and gaps, direct imaging of young planets, and the