Star Abyss Ember Dream

Planet name: Tianyuan Star Type:: Earth-like planet Diameter:: 12,742km Mass:: 5.97×10²⁴Kg Surface gravity: 9.81M/s²(1.0G) Average density: 5.51G/cm³ Rotation period: 24.0 Hours Revolution period: 365. 25 Days Axis inclination: 23.5° Surface composition: 29% land, 71% ocean Ocean average depth: 3,688m [Star system] Star type: G2V: Yellow dwarf Star mass: 1.00: M☉ Star diameter: 1.39×10⁶Km Surface temperature: 5 ,778K Spectral type: G2V Orbital radius: 1.00AU [Atmosphere and Climate] Atmospheric pressure: 1.00Atm Atmospheric composition: N₂78.08%, O₂20.95%, Ar0.93%, CO₂0.04% Average surface temperature: 15°C Equatorial average temperature :25°C Polar average temperature: -15°C Maximum temperature: 56.7°C (record) Minimum temperature: -89.2°C (record) [Satellite] Satellite name: Yinque Diameter: 3,474km Orbital radius: 3.84×10⁵Km Revolution period: 27.3 Days

Planet name: Isela Type: Earth-like planet Diameter: about 15,200 kilometers Mass: about 1.85 Times that of Earth Surface gravity: about 1.32 Times that of Earth Average density: 6.02 G/cm³ (higher metal core ratio) Rotation period: 28.3 Hours Revolution period: 12.0 Earth years (sunshine period) 4.0 Years + snow season 8.0 Years) Axis inclination: about 35.2 Degrees Surface composition: 70% permanent ice cover + 30% land Ice sheet and ocean stratification: Average thickness of ice sheet 500 meters (covering the entire ocean area, thinner, allowing faster release of geothermal and ocean heat) Average depth of subglacial liquid ocean 4,000 meters (providing huge heat capacity from the bottom of the ice sheet to the seabed) Geothermal remains in a liquid state and is physically isolated from the surface ice sheet The thickness of the ice sheet is determined by the balance of geothermal melting at the bottom, surface sublimation and snow accumulation, and the overall structure is stable for a long time [Star system] Star type: K-type main sequence star (orange dwarf) + M-type main sequence star (red dwarf) Binary star total mass: 1.00 M☉ (K-type 0.78 + M type 0.22) Total luminosity of the binary star: 0.71 L☉ Distance between the binary stars: 0.22 AU Planetary orbit: orbiting the center of mass of the binary star (P type) Semi-major axis: 5.24 AU Verification of Kepler's law: $T=a^3/M_{total}=5.24^3/1.00=143.9≈12.0$ Year Eccentricity: 0.70 Perihelion (sunshine period): 1.57 AU, radiation intensity 0.286 Times the Earth Aphelion (snow season): 8.91 AU, radiation intensity 0.00894 Times the Earth [Orbit and Climate Cycle] Sunshine period (near perihelion, 4 years in total): The planet receives radiation 0.286 Times the Earth, global average temperature -35°C to +10°C (perihelion peak) Snow season (near aphelion, 8 years in total): Radiation 0.00894 Times the Earth, global average temperature -130°C to -55°C The total cycle is 12 years, the aphelion appears in the 4th year of the snow season (the 8th year of revolution), and the minimum temperature of -130°C appears at the end of the 5th year of the snow season (the end of the 9th year of revolution) At the end of the snow season (the 12th year) the temperature rises back to -118°C, the sublimation rate of the ice sheet surface accelerates, and organisms can safely enter the recovery stage. It was -118°C at the end of the 12th year, and then entered the first year of the next cycle (-35°C at the beginning of the sunshine period). This temperature jump was achieved by the rapid greenhouse effect (black dust + CH₄) combined with ocean waste heat. The heating rate was about 41.5°C/month, and it took about 2 months to rise from -118°C to -35°C. Climate mechanism: Thermal inertia extension mechanism: Strong radiation at perihelion heats the subglacial ocean, combined with local geothermal anomalies (hydrothermal vents) releasing heat, extending the warm window to 4 years. Underglacial ocean thermal reservoir: The ocean absorbs a large amount of heat during the sunshine period, and then slowly releases it through hydrothermal vents and ice sheet fissures over several years. Black dust effect: The accumulation of cosmic dust at the end of the snow season reduces the albedo of the ice sheet surface from 0.5 To 0.3, Increases the absorbed radiation ratio from 50% to 70%, contributes about 12°C to warming, and forms a dark-colored "sublimation acceleration channel" to accelerate the retreat of the ice sheet. Snowball feedback: ice cover expansion → albedo increase (average snow season 0.5, Still higher than 0.2 On land) → cooling → more snowfall. Geothermal enhancement: The global average geothermal flux is about 0.2 W/m², and local hydrothermal vents can reach 50 W/m². [Satellite: "Frost Moon"] Diameter: 6,150 km Orbit: 448,000 kilometers (tidal locking) Function: Stabilize the axis inclination and contribute 15% to geothermal heat. [Atmospheric Composition and Greenhouse Effect] Total atmospheric pressure: 2.0 Atm Main components: N₂ 64.48%, Ar 14%, O₂ 20%, CO₂ 0.8%, CH₄ 0.8% (The remaining traces) Note: Oxygen partial pressure 0.40 Atm. No SF₆. Greenhouse gas dynamics: Sunshine period: CO₂ 0.8%, CH₄ 0.8%, Bringing the perihelion temperature to +10°C (without greenhouse basis, about -80°C, warming 90K). Snow season: CO₂ condenses into dry ice (the concentration drops to 0.01%), And the CH₄ concentration gradually rises from 0.8% To 2.6% (Microorganisms continue to secrete during the snow season), providing a warming of about 40K; plus the contribution of geothermal waste heat release of about 18K and the black dust effect of about 12K, the total warming is about 70K, rising from -201°C without a greenhouse to the lowest measured value -130°C. CH₄ Source: Methanogens in subglacial hot spring areas. The gas is released through cracks in the ice sheet or hydrothermal vents. [Greenhouse Effect Dynamic Thermometer] (4-year sunshine period + 8-year snow season, ice cover 500m) Early sunshine period -35°C Middle sunshine period +10°C Late sunshine period -5°C End sunshine period -25°C First year of snow season -55°C Second year of snow season -85°C Snow season 3rd year -110°C Snow season 4th year -125°C Snow season 5th year -130°C Snow season 6th year -127°C Snow season 7th year -123°C Snow season 8th year (end) -118°C [Overview of Thermodynamic Mechanism] The temperature rise at the end of the snow season is driven by three factors: 1. Black dust effect: The accumulation of cosmic dust, the albedo drops from 0.5 To 0.3, And the proportion of absorbed radiation increases from 50% to 70%, contributing about 12°C to warming. 2. CH₄ Greenhouse effect: Microorganisms continue to secrete methane during the snow season, with the concentration rising from 0.8% To 2.6%, Contributing to about 40K warming. 3. Subglacial ocean thermal reservoirs and hydrothermal release: The heat stored during the sunshine period is continuously released through hydrothermal vents and ice sheet fissures, contributing about 18K warming, extending the warm window to 4 years. [Biosphere Reconstruction] Surface life: Sunshine window only Plants: Super-fast mosses (30-day life cycle), seed dormancy resistant to -130°C. Animals: small arthropods (metabolism pauses in snow season, recovery rate >90% in sunshine period). The oxygen partial pressure is 0.40 Atm, which can support larger surface biological activities. Permanent life zone: subglacial ocean + hot spring ecosystem Basics: chemosynthetic bacteria (sulfur/iron oxidation). Advanced: blind shrimp, luminous jellyfish (bioluminescence for dark communication). Key adaptation: antifreeze (sugar alcohol + antifreeze protein, cell freezing point -135°C). Hibernation mechanism: The end of the snow season (-118°C) triggers a metabolic pause to avoid damage at -130°C. [Climate Mechanism Supplement] Greenhouse gas timer: Microorganisms continue to secrete CH₄ during the snow season → the concentration accumulates to 2.6% → Triggering rapid warming at the end of the snow season (it takes 2 months to rise from -118°C to -35°C). Black dust effect: The accumulation of cosmic dust in the 8-year snow season reduces the ice sheet surface albedo from 0.5 To 0.3 → The heat absorption efficiency in the early sunshine period increases by 40% → Combined with the waste heat of the ocean, the ice sheet retreat speed is shortened from 6 months to 30 days.