On Monday 21 April, the European Space Agency’s (ESA) Atomic Clock Ensemble in Space (ACES) lifted off from Florida (USA) aboard a SpaceX Falcon 9 rocket, as part of the 32nd SpaceX commercial resupply mission to the International Space Station.
ACES, with two cutting-edge clocks - the Space Clock with Cold Cesium Atoms (PHARAO) and the Space Hydrogen Maser (SHM) - and an advanced time transfer system, should provide the most accurate time signal ever transmitted from space and connect...