The S-IVB also ongoing to thrust in a minimal level by venting gaseous hydrogen, to maintain propellants settled inside their tanks and stop gaseous cavities from forming in propellant feed lines. This venting also preserved Risk-free pressures as liquid hydrogen boiled off within the gasoline tank. This venting thrust quickly exceeded aerodynamic

Map demonstrating landing web site and pictures taken Just after about seven several hours of relaxation, the crew was awakened by Houston to prepare for that return flight. Two as well as a 50 % hrs afterwards, at 17:fifty four:00 UTC, they lifted off in Eagle's ascent stage to rejoin Collins aboard Columbia in lunar orbit.[a hundred forty five] M