planetesimal

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Related to Planetesimals: Planetesimal theory

plan·e·tes·i·mal

 (plăn′ĭ-tĕs′ə-məl)
n.
Any of innumerable small bodies thought to have orbited the sun during the formation of the planets.


plan′e·tes′i·mal adj.

planetesimal

(ˌplænɪˈtɛsɪməl) astronomy
n
(Astronomy) any of a number of small bodies formerly thought to have been drawn from the sun by the close passage of a star to the sun, eventually coalescing to form the planets
adj
(Astronomy) of or relating to planetesimals

plan•e•tes•i•mal

(ˌplæn ɪˈtɛs ə məl)
n.
one of the small celestial bodies that, according to one theory, were fused to form the planets of the solar system.
[1900–05; planet + (infinit) esimal]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.planetesimal - one of many small solid celestial bodies thought to have existed at an early stage in the development of the solar system
celestial body, heavenly body - natural objects visible in the sky
Translations
planétésimal
References in periodicals archive ?
We expected it to be cometary, because the planetesimals ejected from forming planetary systems should (we think) consist mostly of icy material.
The star may be actively destroying the planets and planetesimals in orbit around it and then consuming the remains.
In this ambitious research programme i will answer these three key questions:how does the dust size distribution affect the evolution of ice lines and initial formation location of planetesimals How do growing planets migrate in protoplanetary discs How does the disc evolution affect the formation and composition of planetary systemsi will tackle these questions using a combination of novel ideas and computer simulations in which i will model the three before mentioned connected key stages of planet formation.
The main belt contains vast numbers of irregularly shaped asteroids, also known as planetesimals, orbiting the Sun between Mars and Jupiter.
The discovery was made using Europe's Transiting Planets and Planetesimals Small Telescope, or TRAPPIST, located at the La Silla Observatory in Chile.
The researchers used the Transiting Planets and Planetesimals Small Telescope (TRAPPIST) to find the three Earth-like planets.
It's the perfect recipe if you want to form planets or planetesimals," said Isella, of Rice University in Houston.
The current leading theory for planetary formation is the core-accretion model, in which a heavy element core is built by the accretion of planetesimals.
When these burnt-out cores of former stars gobble up shredded rocky debris from planetesimals or asteroids (the building blocks of planets like the Earth), that material changes the light of the star that we observe in such a way that we can work backwards and uncover the actual chemical composition of the in-falling rocks.
On the history of lunar impact cratering: The absolute time scale and the origin of planetesimals.
When these burntout cores of former stars gobble up shredded rocky debris from planetesimals or asteroids (the building blocks of planets like the Earth), that material changes the light of the star that we observe in such a way that we can work backwards, and uncover the actual chemical composition of the infalling rocks.
As Jupiter moved inward, however, gravitational perturbations from the giant planet would have swept the inner planets (and smaller planetesimals and asteroids) into close-knit, overlapping orbits, setting off a series of collisions that smashed all the nascent planets into pieces.