Astrophysics (index)

Protoplanet

(simplest, least-developed object classified as a planet)

The term Protoplanet naturally refers to the "earliest" objects in a system that can be classified as planets. (The definition of Planet varies: sometimes based on its structure and sometimes based upon its effect on the system, e.g., having the ability to protect a "lane" around its orbit.)

The term is more specifically used for objects that are more planet-like for having developed some internal layers through melting. Some Asteroids, such as Ceres, Pallas, and Vesta fit the description.


(planets,object type)
http://en.wikipedia.org/wiki/Protoplanet

Referenced by:
Bondi Radius
Embryo Barrier

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