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Comet vs Planetesimal - What's the difference?

comet | planetesimal |

As nouns the difference between comet and planetesimal

is that comet is (astronomy) a celestial body consisting mainly of ice, dust and gas in a (usually very eccentric) orbit around the sun and having a "tail" of matter blown back from it by the solar wind as it approaches the sun while planetesimal is planetesimal.

comet

English

(wikipedia comet)

Noun

(en noun)
  • (astronomy) A celestial body consisting mainly of ice, dust and gas in a (usually very eccentric) orbit around the Sun and having a "tail" of matter blown back from it by the solar wind as it approaches the Sun.
  • A celestial phenomenon with the appearance given by the orbiting celestial body.
  • Any of several species of hummingbird found in the Andes.

    • Synonyms

    * (l)

    Derived terms

    * cometary * cometoid * exocomet

    Related terms

    *

    planetesimal

    English

    (wikipedia planetesimal)

    Noun

    (en noun)
  • Any of many small, solid astronomical objects, that orbit a star and form protoplanets through mutual gravitational attraction

    • See also

    * protoplanet * planetoid * minor planet * dwarf planet * major planet * superplanet * planet * planemo * mesoplanet * asteroid