Protoplanetární
Protoplanetární is a term used in astronomy to describe a celestial body that is in the process of forming into a planet. These are essentially large clumps of gas and dust that have not yet fully coalesced or cleared their orbital paths. They are found within protoplanetary disks, which are rotating disks of gas and dust that surround young stars. These disks are the birthplaces of planets, and protoplanets are the intermediate stages in this planetary formation process.
The formation of protoplanets is thought to occur through accretion, where smaller particles collide and stick