#rocket propulsion

• Astronautic — Belonging to astronautics, relating to astronautics; referring to the techniques, technologies, vehicles, or physical laws involved in the navigation and flight of manned or automated craft outside the Earth's atmosphere. The term defines structural engineering elements, propulsion systems, orbital trajectories, or research missions conducted in deep outer space.
• Astronautics — The science and branch of modern technology dealing with the study, design, construction, and operation of spacecraft (rockets, satellites, probes, orbital stations) intended for travel or research outside the Earth's atmosphere. This interdisciplinary discipline gathers advanced knowledge of celestial mechanics (astrodynamics), chemical or nuclear propulsion, onboard electronics, and space medicine to ensure the exploration of the universe.