Planet Description
Stellaluna is a terrestrial exoplanet optimized for astronomical observation, featuring 52% oceanic coverage with high-reflectivity surface waters ideal for interferometric measurements. The planet orbits a G5V-type star with luminosity of 1.05 L☉, providing high-contrast illumination conditions. Atmospheric composition includes elevated argon content (3.5% by volume) and trace xenon (15 ppm) utilized in precision spectroscopic instrumentation. The planet's moderate axial tilt (22°) ensures balanced seasonal observation windows, while its rapid rotation period (19.7 hours) enables efficient sky coverage. Geological features include iron-rich mantle structures (seismic wave speed: 5.6 km/s) and rift zones suitable for vibration-isolated subsurface research facilities. The magnetic field strength of 4.8 × 10⁻⁵ T provides stable compass-based instrument alignment.
Planet Statistics
Orbital Data:
| Stat | Value |
|---|
| Mass | 7.25 × 10^24 kg (≈ 1.21 Earth masses) |
| Gravity | 10.8 m/s² (≈ 1.10 g; steady pull for ground-based telescopes) |
| Orbital Period | 402.7 days (one “stellar season” around its sun) |
| Rotational Period | 19.7 hours (rapid days to scan the night sky) |
Atmospheric Conditions:
| Stat | Value |
|---|
| Nitrogen | 64.0 % by volume |
| Oxygen | 21.0 % by volume |
| Argon | 3.5 % by volume (echoes of past supernovae) |
| Carbon Dioxide | 21.0 % by volume |
| Methane | 15 ppm (used in high-precision spectrographs) |
| Neon | 200 ppm (glows faintly around polar research domes) |
Geological Data:
| Stat | Value |
|---|
| Mean Radius | 6 900 km (≈ 1.08 Earth radii) |
| Equilateral Circumference | 43 380 km |
| Volume | 1.37 × 10^12 km³ |
| Surface Area | 596 million km² |
Hydrological Data:
| Stat | Value |
|---|
| Mist and Cloud Coverage | 52 % (deep “mirror seas” reflect the starfields) |
| Lakes and Inland Seas | 14 % (calm basins for optical telescopes) |
| Ice and Crystal Formations | 4 % (mineral-rich ice fields) |
| Average Ocean Depth | 4 000 m |
| Total Water Volume | 1.35 billion km³ |
Magnetic and Geophysical Data:
| Stat | Value |
|---|
| Geothermal Gradient | 28–50 °C/km (hidden hot springs power deep-space arrays) |
| Magnetic Field Strength | 4.8 × 10⁻⁵ T (stable for compass-based alignments) |
Auroral and Geomagnetic Data:
| Stat | Value |
|---|
| Chrono Auroral Cycle | ~26 days (charged-particle surges light up research domes) |
| Twilight Resonance Band | moderate—peaks every 4 months with solar flares |
| Magnetic Reconnection Events | frequent at high latitudes, disrupting and inspiring new observations |
Planetary Motion Data:
| Stat | Value |
|---|
| Halo Storm Cycle | 0.038 (moderate variation brings clearer skies in perihelion) |
| Obliquity | 22° (balanced seasons for uninterrupted observing windows) |
| Precession Period | 22 500 years (slow drift of celestial poles) |
Tectonic Motion Data:
| Stat | Value |
|---|
| Seismic Wave Speed | 5.6 km/s (through dense, iron-rich mantle) |
| Plate Boundary Length | ~72 000 km (rift zones leveraged for sub-surface observatories) |
| Quakes per Year | ~11 million (mostly faint “astro-tremors” monitored by chronoseismometers) |
Solar and Stellar Data:
| Stat | Value |
|---|
| Host Star Luminosity | 1.05 L☉ (a slightly brighter star for clearer skies) |
| Star Surface Temperature | 5 900 K (crisp, high-contrast daylight) |
| Solar Irradiance | 1 420 W/m² (filtered by thin upper-atmosphere haze) |
Surface Preview
