Planetesimals
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Before humans before earth before any of the planets existed there were baby planetsplanetesimals.
Planetesimal plaentsmel astronomy n astronomy any of a number of small bodies formerly thought to have been drawn from the sun by.
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Planetesimals. Lets start at the beginning. One of saturns 53 moons phoebe is a planetesimal as well as both of mars moons phobos and deimos. The largest of neptunes 13 moons triton falls into this category. As the solar system formed from a nebula gases and molecules combined and grew larger and larger.
Many of the moons orbiting planets are considered planetesimals. The planetesimals that eventually formed from the solid material present thus were deficient in volatiles but rich in silicates and other less volatile materials which solidified at the higher temperatures. Planetesimal definition one of the small celestial bodies that according to one theory planetesimal hypothesis were fused together to form the planets of the solar system. Planetesimals p l ae n t s m el z are solid objects thought to exist in protoplanetary disks and in debris disksper the chamberlinmoulton planetesimal hypothesis they are believed to form out of cosmic dust grains.
Consolidations of these rocky planetesimals formed the four small dense inner or terrestrial planetsmercury venus earth and mars. Other planetesimals turn into comets kuiper belt objects kbos and trojan asteroids. Soon the planetesimals get big enough to exert a gravitational influence whereby they collide with one another to increase even more in size. Planetesimal definition is any of numerous small celestial bodies that may have existed at an early stage of the development of the solar system.
Any of innumerable small bodies thought to have orbited the sun during the formation of the planets. Coalesced from dust exploded outward by the solar nebula. Thanks to the force of gravity larger planetesimals. Planet infinitesimal planetesimal adj.
In addition jupiter has 50 moons and several of these match the criteria for planetesimals.