protoplanet

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protoplanet [′prōd·ō‚plan·ət]

(astronomy)

A precursor of one of the giant planets, which is believed to have formed, along with its satellites, from a minisolar nebula in a manner similar to that of the formation of the sun and planets.

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No references found			Once protoplanets grew to diameters of 200 kilometers or larger, the radioactive elements trapped within those masses generated enough heat to melt minerals at the orbs' cores. As life evolves, minerals do too: team recounts dramatic changes in ... by Perkins, Sid / Science News Lastly, water, once it is formed, must be gathered together on a protoplanet before life can evolve--essential sequencing. Evolution is not the enemy; intelligent design is not the solution by Pinkham, Carlos Frank Amory / Forum on Public Policy: A Journal of the Oxford Round Table In the subsequent cycle, all the eight protoplanets become separated (Figures 6 and 7). Origin of planetary systems due to dichotomous division of the ... by Kompanichenko, Vladimir / Frontier Perspectives			proton radioactivity proton resonance proton scattering microscope proton stability constant proton storage ring Proton Synchrotron proton vector magnetometer proton-electron-proton reaction proton-induced x-ray emission proton-proton chain proton-proton cycle proton-proton reaction proton-proton scattering proton-recoil counter proton-rich nucleus protonate protonation Protonema Protonephridium protonic acid protonium Protopathic Sensibility protophilic protophloem Protophyta protoplanet protoplanet theory protoplanetary disk Protoplasm Protoplast protoplast fusion protopodite Protopopov, Aleksandr Protopopov, Aleksandr Dmitreyevich Protopopov, Aleksandr Dmitrievich Protopteridales Protopterus protoquartzite protore Protosireninae Protospondyli Protostar Protostele Protostomia protostratigraphy Protostyly Protosuchia protosun Protosynthex Protot, Charles Louis Eugene Protot, Charles Louis Eugène			Protooncogene Protooncogene Protooncogene Protoorganism Protopam Chloride Protopapas protopathic protopathic Protopathic Pain protopathic sensibility protopathic sensibility protopathic sensibility protopathic sensibility protopathic sensitivity protopathy protopathy protopepsia Protophane protophilic protophilic protophloem protophloem Protophormia terraenovae protophyrinogen oxidase Protophyta Protophyta Protophyte Protophytology Protopic Protopine protoplanet Protoplanet theory Protoplanet theory Protoplanetary disc Protoplanetary disc Protoplanetary discs Protoplanetary discs Protoplanetary disk Protoplanetary disk Protoplanetary disks Protoplanetary disks Protoplanetory disc Protoplanetory disc Protoplanets Protoplanets protoplasm protoplasm protoplasm protoplasmal protoplasmal protoplasmal protoplasmatic protoplasmatic protoplasmatic protoplasmic protoplasmic protoplasmic protoplasmic astrocyte protoplasmic astrocyte protoplasmic bridge protoplasmic bridge

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