Fans facing the fire
Kepler-1649 has a catalog effective temperature of 3,240 ± 61 kelvin. Its light has a different spectral distribution from sunlight, so an imagined light collector need not resemble a green terrestrial leaf. The quoted incident energy, however, includes wavelengths an organism may be unable to use. Total stellar heating and usable photosynthetic photons are different quantities [1, 2]. The fans in this landscape spread dark, veined membranes toward the luminous sky. Their copper edges and nearly black interiors are an artistic hypothesis about absorbing surfaces, protective compounds and structural tissues. We have not identified a pigment, established its efficiency or calculated a biochemical energy budget. Research on terrestrial photosynthetic spectra provides a useful question: how might a star and an atmosphere change the light available to life? It does not predict the precise colors of this forest. Atmosphere, water depth, scattering and evolutionary history would all matter. The fictional palette expresses that uncertainty rather than solving it [3]. Small radial cleaners work under the folds, removing mineral films and loose tissue. The large surface can gather light only while it remains functional. Here the botanical organism supplies shelter and food, and its mobile partners help maintain the very surface on which both depend. Viewpoint: Highland slope facing the host.
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-1649 c is a transiting planet around Kepler-1649. Its saved catalog radius is 1.06 (+0.15 / −0.10) Earth radii and its period is 19.53527 ± 0.00010 days [Vanderburg et al. 2020]. This scene explores stellar spectrum and light capture. Fan colonies spread absorbing membranes toward the light; cleaner symbionts remove mineral films that would shade them. All illustrated biology is fictional.
Vanderburg et al. 2020 — Kepler-1649 c discovery and measured parameters · NASA Exoplanet Archive — Kepler-1649 c · Kiang et al. 2007 — photosynthetic spectra as a general research context · Vanderburg et al. 2020 · Q1-Q17 DR25 KOI Table
Available measurements
Host: Kepler-1649 · 1 catalog star(s) · Rocky-size candidate
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 | 1.06 [+0.15 / -0.1] | Earth radii | Vanderburg et al. 2020 |
| Planet mass | 1.2 | Earth masses | Calculated Value |
| Bulk density | 5.54 | g/cm³ | Calculated Value |
| Orbital period | 19.535 [+0.0001 / -0.0001] | days | Vanderburg et al. 2020 |
| Orbital semimajor axis | 0.0649 | AU | Q1-Q17 DR25 KOI Table |
| Orbital eccentricity | 0 | Q1-Q17 DR25 KOI Table | |
| Orbital inclination | 89.339 [+0.056 / -0.056] | degrees | Vanderburg et al. 2020 |
| Irradiation | 0.75 [+0.032 / -0.302] | Earth flux | Vanderburg et al. 2020 |
| Equilibrium temperature | 234 [+20 / -20] | K; not surface temperature | Vanderburg et al. 2020 |
| Catalog stellar effective temperature | 3,240 [+61 / -61] | K | Vanderburg et al. 2020 |
| Catalog stellar radius | 0.2317 [+0.0049 / -0.0049] | Solar radii | Vanderburg et al. 2020 |
| Catalog stellar mass | 0.1977 [+0.0051 / -0.0051] | Solar masses | Vanderburg et al. 2020 |
| Catalog stellar luminosity | -2.2873 [+0.01652 / -0.01717] | log10 Solar luminosity | Vanderburg et al. 2020 |
| Catalog stellar age | Unknown | Gyr | Source not supplied |
| Catalog stellar metallicity | -0.15 [+0.11 / -0.11] | dex | Vanderburg et al. 2020 |
| System distance | 92.191 [+0.5489 / -0.5425] | pc | TICv8 |
What about life?
Passes a deliberately broad 0.25–1.75 Earth-flux triage window. This is not a calculated habitable zone or evidence of water or life. Atmosphere, surface pressure, water inventory, stellar activity and orbital history remain unassessed. No confirmed life; no planet-specific biosignature literature review in this release.
Papers and references
Vanderburg et al. 2020 — Kepler-1649 c discovery and measured parameters · NASA Exoplanet Archive — Kepler-1649 c · Kiang et al. 2007 — photosynthetic spectra as a general research context · Vanderburg et al. 2020 · Q1-Q17 DR25 KOI Table · TICv8