The critical point, denoted by the big gray dot, is a special combination of temperature (T c =31 C) and pressure (P c =73 atm) where CO 2 has properties of both liquid and gas. Harvesting renewable energy from the sun and outer space at the same time Date: November 8, 2018 Source: Cell Press Summary: Scientists … Asteroid mining could shift from sci-fi dream to world-changing reality a lot faster than you think. Supercritical carbon dioxide behaves much the same. Time to make good use of the Nanite Factory in this episode of Space Engineers Modded Multiplay Survival as we set about harvesting resources. CO 2 molecules flow into solid matter, surrounding atoms, pulling them apart and away.. Left: A phase diagram. Above the critical point, it becomes a supercritical fluid. NASA participates in "Living Off the Land in Space" lecture series at Florida Institute of Technology.