Characteristics of Planetesimals
Planetesimals have several key characteristics that distinguish them from other types of particles:
- Solid composition: Planetesimals are composed of solid materials, such as rock and metal, which are held together by gravity.
- Small size: Planetesimals are typically much smaller than planets, ranging in size from a few micrometers to several kilometers in diameter.
- High density: Planetesimals are dense, with densities that are typically higher than those of asteroids and comets.
- Round shape: Planetesimals are often spherical in shape, reflecting their high density and gravity.