Non-Periodic Comet
Comet with hyperbolic or parabolic orbit that passes only once through the inner planetary system before being ejected into interstellar space by gravitational perturbations.
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Yellow dwarf star
A yellow dwarf star is a main-sequence star of medium size, whose light appears yellow due to the temperature of its surface and balanced radiation.
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Terrestrial planet with dense atmosphere
A terrestrial planet with a dense atmosphere is a rocky body whose thick gaseous layer modifies surface temperature, pressure, and interactions with surrounding space.
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Asteria Planet
Planets of the Asteria class are rocky bodies without an atmosphere, exposed to large temperature variations, direct stellar radiation, and intense impact activity.
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Erythraea
Planets of the Erythraea class are desert rocky bodies with a thin carbon dioxide atmosphere, subjected to strong erosion and sharp thermal contrasts.
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G2V-Type Star
A star of spectral type G2V is a yellow dwarf of the main sequence, powered by hydrogen nuclear fusion, characterized by its stability and energy balance.
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Gaïana
Gaïana-type planets are rocky worlds with a dense atmosphere of nitrogen and oxygen, allowing liquid water, an active hydrological cycle, and stable geological dynamics.
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Sulfuris
Planets of the Sulfuris class are rocky bodies with a dense atmosphere of carbon dioxide and sulfur dioxide, high temperatures, intense greenhouse effect, and constant volcanism.
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Gigantides
Gigantides are giant gas planets without a defined solid surface, composed mostly of hydrogen and helium, with layered atmospheres, high wind speeds, frequent rings, and numerous satellites.
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Pyrogiants
Pyrogiants are massive gas planets orbiting very close to their star, characterized by extreme temperatures, ionized atmospheres, metallic vapors, fast winds, and large thermal contrasts.
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Aquilides
Aquilides are icy giant planets with a high fraction of volatiles, dense internal layers, a hydrogen-helium atmosphere, methane absorption, and strong winds at very low temperatures.
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Thermocryas
Thermocryas are a theoretical class of moderately warm ice giants, intermediate between Borealis and Pyrogiants in orbital irradiance. Warmer than classical ice giants yet below widespread ionization, they exhibit altered chemistry and dynamic weather.
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