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Protoplanet
 Image from Steve Bowers |
Massive object resulting from the coalescence of planetesimals in the solar nebula, which eventually becomes a mature planet. Protoplanets are constantly impacted by other objects in the protoplanetary swarm, so are often very hot, with a molten or semi-molten surface.
Has a thick primary atmosphere, generally of hydrogen and helium, much of which will be lost unless the planet gains enough mass to become a gas giant. Because of the potential for mining and megascale engineering, protoplanets are often highly sought after by interstellar development corporations and certain clades and hyperturings.
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- Protostar - Text by M. Alan Kazlev
A gravitationally stable cloud of interstellar gas and dust of stellar mass contracting in an early pre-main-sequence evolutionary state. Because of the dense and easily harvestable concentration of interstellar dust and gas, protostars are highly sought after by interstellar development corporations and certain clades and hyperturings. - T Tauri star
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Development Notes
Text by M. Alan Kazlev and Steve Bowers
Initially published on 19 December 2001.
Initially published on 19 December 2001.
