Exoplanets: Gliese 12 b

• Planet: Gliese 12 b
• Sequence: 08
• Saved image path: My-Library/Images/Collections/Exoplanets/Images/Exoplanets_08-Gliese-12-b.png
• Model: built-in gpt-image
• Generation date: 2026-07-11

Planet Profile

• Planet type: terrestrial
• Host star: M-type red dwarf
• Mass: ~0.95 Earth masses
• Radius: ~0.93 Earth radii
• Orbital period: 12.8 days
• Orbital distance: 0.067 AU
• Equilibrium temperature estimated around 315 K in published validation work

Environment

• Gravity: near Earth
• Climate: warm / temperate depending on atmosphere
• Atmosphere: unknown
• Surface: rocky
• Light: red-dwarf light

Creature Design Direction

Warm rocky-world organisms, desert-coast hybrids, heat regulation adaptations.

Planet / Habitat Depicted

Surface-level warm rocky world with rough basalt plains, dark lava ridges, red-dwarf sky, heat shimmer, thin haze, volcanic-gray ground texture, and a long-limbed heat-radiating reptile analogue walking across fractured rock.

Sources

• Data provided in the collection plan (Prompts/generate-exoplanets-collection.md); measurements are from published exoplanet catalogs. No web research performed for this collection.

Final Prompt Used

Use case: scientific-educational
Asset type: Exoplanets image collection entry, final 3:2 landscape PNG, 1536x1024
Primary request: Create a scientifically plausible alien creature from Gliese 12 b, while also clearly depicting the planet itself through a surface-level environmental view: the general environment, rocky surface, ground texture, sky, atmosphere, weather, horizon, and host-star lighting. Do not show Gliese 12 b as a separate sphere in the sky; do not add moons, extra planets, orbital views, or space cutaways.

Core description: A warm-world alien reptile analogue from Gliese 12 b, Earth-sized rocky exoplanet around a red dwarf, near-Earth gravity, heat-radiating sail fins, long limbs, matte volcanic-gray skin, amber eyes, moving across warm basalt plains, realistic scientific illustration.

Planet context: terrestrial planet around an M-type red dwarf; mass about 0.95 Earth masses; radius about 0.93 Earth radii; orbital period 12.8 days; orbital distance 0.067 AU; equilibrium temperature estimated around 315 K in published validation work. Near-Earth gravity, warm to temperate depending on atmosphere, rocky surface, atmosphere unknown, red-dwarf light.

Planet / habitat depiction requirements: Make the world read as Gliese 12 b from the surface, not as a generic desert. Show warm basalt plains with rough volcanic ground, scattered mineral crusts, heat shimmer close to the surface, low red-dwarf sunlight filtering through a thin hazy sky, distant dark lava ridges or shield-volcano terrain on the horizon, and a warm rocky-world climate. The organism should interact with the terrain through foot contact, dust, and posture adapted to heat and open basalt flats.

Creature requirements: Body plan reflects near-Earth gravity: agile but substantial, long-limbed, balanced for walking or trotting over broken basalt. Sensory organs reflect red-dwarf lighting: amber eyes suited to muted red light. Skin and thermoregulation reflect a warm rocky world: matte volcanic-gray skin, heat-radiating sail fins with fine blood-vessel structure, subtle reflective scale patches, no fantasy ornament. Locomotion fits warm basalt plains: careful foot placement on fractured rock, body angled against heat rising from the ground.

Style/medium: natural-history field-guide illustration, realistic scientific/anatomical detail, documentary lighting, NASA meets National Geographic meets speculative astrobiology, one unified scene.
Composition/framing: wide 3:2 landscape, balanced creature portrait plus readable planetary landscape; do not crop tightly. Creature in the foreground or midground with visible basalt surface, sky, atmospheric haze, weather, and horizon. Not a collage, not a diagram.
Color palette: matte volcanic gray organism, muted rust and charcoal basalt, amber eyes, deep red stellar light, restrained scientific realism.
Constraints: no humanoid anatomy unless scientifically justified; no fantasy monster design; no embedded text, labels, logos, watermarks, real-person likenesses, official insignia, separate planet globe in the sky, moons, extra planets, orbital scene, or space cutaway.