Yesterday I created an exoplanet on Space Engine, and then started to imagine how life could be possible on that little rock.
I started to think about bacterial cells / archaea, anaerobic organisms living under the ice.
And after that, right now, I am having a bigger question: How humans could start a colony here with realistic "hard science" technologies ?
The planet looks like an ice world, the average temperature is under 0, even if some places should be above that..
The parent star is a G7.2V, 0.7 times brighter than the sun and with roughly the same mass.
Name: Marpal c
Class: Temperate rocky world
Diameter: 6224.8 km
Mass: 0.1242 Earth mass
Orbital period: 283.355 days
Rotation period: 11h 36m 45s
Axial tilt: 4° 15'39"88
Age: 1.730 x 10^9 years
Gravity: 0.52 G
Atmosphere composition: 98.2% Co2, 1.63% N2, 0.131% of H2O
Atmosphere pressure: 0.0979 atm
Average temperature: -8.601 °C
Density: 5.9 g/cm3
For this scenario we could use 1000 colonists, they will have modern tech and of course a generation ship able to reach that planet (let's say, 10 light years away from us), something able to keep them alive and to reach 10-15% of the speed of light (Project Orion like)..
And finally, they had knowledge about the planet before arriving (they used probes for analysing the world)