Planetesimals are small, rocky or icy bodies that formed in the early solar system. They are thought to be the building blocks of planets.
Here's what we know about planetesimals:
* Formation: They formed from dust and gas in the protoplanetary disk surrounding the young Sun.
* Size: They range in size from a few meters to hundreds of kilometers in diameter.
* Composition: Their composition varies depending on their location in the disk. Those closer to the Sun tend to be rocky, while those farther out are mostly icy.
* Role in Planet Formation: Through collisions and gravitational attraction, planetesimals eventually grew into the planets we see today.
If you had another term in mind, please let me know!
