+A **planetesimal** is a cosmic seed, a small, rocky, or icy body born from the dust and gas swirling in a [Protoplanetary Disk](/wiki/Protoplanetary_Disk). These primordial fragments, through countless collisions and gravitational attraction, grew into the larger [Planets](/wiki/Planet) and other celestial objects we see today.
+## See also
+- [Planet Formation](/wiki/Planet_Formation)
+- [Accretion](/wiki/Accretion)
+- [Asteroid](/wiki/Asteroid)
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