The five-moon infirmary
They still repair one another. No one remembers who taught them to care.
The imagined scene
The host system is real. All alien organisms, robots, societies and social histories are fictional. Moons, rings, terrain and weather are artistic assumptions unless specifically supported by a cited source. These images are not calibrated simulations of the sky.
The scientific anchor
Kepler-47 c is a confirmed circumbinary planet in the NASA catalog: it orbits two stars in about 303.227 days and has radius 4.65 Earth radii. The planet is gas-rich. The viewpoint is an invented atmospheric habitat, not a habitable planetary surface. No depicted moon, artificial intelligence, civilization or disappearance of organic life is an observed discovery.
Available measurements
Host: Kepler-47 · 2 catalog star(s) · Sub-Neptune / Neptune-size
NASA composite catalog values may combine different papers. Errors and upper/lower limits are retained. “Calculated Value” means derived or estimated. Msini is a minimum mass. Missing values are unknown. A multiple-star system’s single stellar row does not describe every component. Equilibrium temperature is not a measured surface temperature.
| Quantity | Value & uncertainty | Unit | Paper / source |
|---|---|---|---|
| Planet radius | 4.65 [+0.09 / -0.07] | Earth radii | Orosz et al. 2019 |
| Planet mass | 3.17 [+2.18 / -1.25] | Earth masses | Orosz et al. 2019 |
| Bulk density | 0.17 [+0.09 / -0.07] | g/cm³ | Orosz et al. 2019 |
| Orbital period | 303.23 [+0.062 / -0.027] | days | Orosz et al. 2019 |
| Orbital semimajor axis | 0.9638 [+0.0041 / -0.0044] | AU | Orosz et al. 2019 |
| Orbital eccentricity | 0.044 [+0.029 / -0.019] | Orosz et al. 2019 | |
| Orbital inclination | 90.192 [+0.0055 / -0.0042] | degrees | Orosz et al. 2019 |
| Irradiation | 0.9037 [+0.0722 / -0.0722] | Earth flux | Calculated Value |
| Equilibrium temperature | 267.82 [+4.84 / -4.84] | K; not surface temperature | Calculated Value |
| Catalog stellar effective temperature | 5,636 [+100 / -100] | K | Orosz et al. 2012 |
| Catalog stellar radius | 0.936 [+0.005 / -0.005] | Solar radii | Orosz et al. 2019 |
| Catalog stellar mass | 0.957 [+0.013 / -0.015] | Solar masses | Orosz et al. 2019 |
| Catalog stellar luminosity | -0.076 [+0.033 / -0.036] | log10 Solar luminosity | Orosz et al. 2012 |
| Catalog stellar age | Unknown | Gyr | Source not supplied |
| Catalog stellar metallicity | -0.25 [+0.08 / -0.08] | dex | Orosz et al. 2012 |
| System distance | 1,025 [+30.645 / -30.645] | pc | TICv8 |
What about life?
A substantial volatile envelope is plausible. A habitable ocean or surface cannot be inferred from radius; atmosphere and interior research required. No confirmed life; no planet-specific biosignature literature review in this release.