Encyclopedia > Protoplanet

  Article Content


In cosmogony, a protoplanet is a quasi-planetoid which is slightly larger than a planetesimal and orbits within a solar nebula's protoplanetary discs. Such objects are formed by the accretion of objects (such as dust and planetesimals) within the accretion disc of a solar nebula. Early protoplanets are generally relatively hot and liquid. As the protoplanets cool into planets, their heavier elements will sink to the center; while lighter elements rise to the surface; such a process is known as differentiation.

All Wikipedia text is available under the terms of the GNU Free Documentation License

  Search Encyclopedia

Search over one million articles, find something about almost anything!
  Featured Article

... applied. This is why spinning gyro tops will not simply fall over, but start precessing around. (The precessing motion is perpendicular to the torque trying to make the ...

This page was created in 73.3 ms