System: HIP 21373 - All bodies
Distance to Sol: 476.17 ly
Distance To Arrival: 1,904 ls
Is Landable: No
Terraforming: Not terraformable
Earth Masses: 8.8461
Radius: 20,562 KM
Gravity: 0.85 G
Surface Temperature: 158 K
Atmosphere Type: 73.5% Hydrogen
26.4% Helium
0.1% Oxygen
Orbital Period: 2,302.1 D
Semi Major Axis: 3.82 AU
Orbital Eccentricity: 0.0024
Orbital Inclination: 0.00 °
Arg Of Periapsis: 295.44 °
Rotational Period: 0.6 D
Axis Tilt: -0.19 °
Attractions: None

Gas giant with water-based life. This is primarily a hydrogen and helium based atmospheric gas giant, but not far below the surface exists life based in the water-cloud layer just below the atmospheric surface. The chemistry of this gaseous region is far from equilibrium, with a surprising excess of oxygen and many carbon-based compounds giving it some vivid colours. As with many such gaseous living systems, it is underpinned by vast quantities of free-floating radioplankton - tiny carbon-based algae, each retaining small quantity of liquid water, extracting their energy from the intense radiation flux.