Planet rock is actually a decent insulator in large volumes/long timescales. You’d just heat up the nearby rock quickly, assuming you plan to compute for longe

Planet rock is actually a decent insulator in large volumes/long timescales. You’d just heat up the nearby rock quickly, assuming you plan to compute for longer than a week. https://en.wikipedia.org/wiki/Seasonal_thermal_energy_storage#Underground_thermal_energy_storage https://en.wikipedia.org/wiki/Seasonal_thermal_energy_storag...