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Protoplanet vs Planetary - What's the difference?

protoplanet | planetary |

As nouns the difference between protoplanet and planetary

is that protoplanet is an astronomical object, approximately the size of the moon, formed from the mutual gravitational attraction of planetesimals; they are thought to collide with each other and slowly form planets while planetary is a planetary nebula.

As an adjective planetary is

(astronomy) of, or relating to planets, or the orbital motion of planets.

protoplanet

English

Noun

(wikipedia protoplanet) (en noun)
  • An astronomical object, approximately the size of the Moon, formed from the mutual gravitational attraction of planetesimals; they are thought to collide with each other and slowly form planets

    • Derived terms

    * protoplanetary

    planetary

    English

    Adjective

    (-)
  • (astronomy) Of, or relating to planets, or the orbital motion of planets.
  • * Fuller
    • erratical and planetary life
  • Of, or relating to the Earth; terrestrial.
  • Of, or relating to the whole Earth; global.
  • (of a gear train) epicyclic

    • Synonyms

    * (of the whole earth) global * (of a gear train) epicyclic

    Derived terms

    * *

    Noun

    (planetaries)
  • A planetary nebula.