Space programs

European Space Agency reusable launcher prototype

reusable rocket engine

thumb|Overview of the architecture of CALLISTO CALLISTO (Cooperative Action Leading to Launcher Innovation in Stage Toss-back Operations) is a reusable VTVL demonstrator propelled by a small 40 kN Japanese LOX-LH2 rocket engine. It is being developed jointly by the French (CNES), German (DLR), and Japanese (JAXA) national space agencies. thumb|Simulation of mass flow around CALLISTO thumb|Early illustration of CALLISTO thumb|Model of CALLISTO at Paris Air Show 2025 The goals for CALLISTO are to mature and demonstrate the technologies which are necessary to build and operate a reusable launch v

orbital recoverable launch vehicle of the European company ArianeGroup

ongoing space research program