Abstract: The invention concerns a method of providing a space extended reality service on earth, including: acquiring, by means of one or more acquisition systems/devices installed on a space platform, real-time data related to a surrounding space environment and/or to one or more astronauts in the space environment; generating, by means of a computer graphics processing device/system, based on the acquired real-time data and on synthetic data, a three-dimensional extended reality environment reproducing the space environment and one or more three-dimensional avatar(s) of the astronaut(s) reproducing movements and/or actions and/or facial expressions and/or voice of the astronaut(s), wherein the synthetic data digitally represent the space environment and/or the astronaut(s); and providing one or more users on earth with a space extended reality service based on the generated three-dimensional extended reality environment and avatar(s).