#space exploration

• Aerospace — Belonging or relating simultaneously to Earth's atmosphere and the outer space beyond it, or to the design and construction of vehicles intended for navigation in both environments. This term describes an extremely complex industrial and scientific branch, structurally encompassing aerodynamic research, rocket engineering, satellite flight, and extra-atmospheric navigation systems.
• Aldebaran — The brightest star in the constellation of Taurus (Alpha Tauri) and the fourteenth-brightest star in the night sky, located approximately 65 light-years from Earth. It is a red giant star, much cooler than the Sun, but with a diameter about 44 times larger, easily recognizable due to its distinct reddish-orange hue.
• Moon-land — To perform a controlled descent and landing maneuver of a spacecraft, module, or cosmic vehicle on the surface of the Moon. This high-precision technological and astronautical process involves slowing down the travel speed using retrorockets to guarantee a smooth contact with the lunar soil without damaging the equipment.
• Moon landing — The act of moon-landing and its result; the complete aerospace operation of descent, structural contact, and securing of a cosmic vehicle on the crust of the Moon. This engineering phenomenon represents one of the most complex phases of a lunar mission, requiring real-time dynamic velocity and altitude corrections.
• To land on Mars — To touch down, land, or guide a spacecraft, cosmic probe, or exploration module onto the surface of the planet Mars in a controlled manner. It is the Martian equivalent of the terms 'to land' (on Earth) or 'to lunaland' (on the Moon).
• Splash down — To perform a maneuver of descending and making controlled contact with the surface of a sea or an ocean, specific to seaplanes, adapted helicopters, or space capsules when returning to Earth; to make structural contact with water at the end of an aerial or cosmic flight.
• To land on the Sun — To perform a smooth descent and controlled landing of a spacecraft, exploration module, or cosmic probe onto the surface of the Sun or within a theoretical zone extremely close to the solar atmosphere; the term is used exclusively in sci-fi literature or speculative theoretical studies, built by analogy with verbs like 'aseleniza' or 'ateriza'.
• Asteroid — A rocky or metallic celestial body, much smaller than a planet, orbiting the Sun, with most clustered in the main belt between Mars and Jupiter; as an adjective, it describes an object, organism, or structure exhibiting a stellar shape or star-like radial symmetry.
• Astrodrome — A large-scale technical and scientific complex (spaceport, cosmodrome, or rocket launch site) equipped with launch pads, control centers, assembly hangars, and special runways intended for the takeoff, landing, guidance, and tracking of spacecraft, interplanetary rockets, or orbital planes. In science fiction literature and future infrastructure designs, the term describes spaceports located on Earth, the Moon, or other celestial bodies.
• Astronaut — A person specifically trained and qualified to navigate in outer space or to serve as a crew member on a spacecraft, orbital station, or interplanetary vehicle. Their activity involves piloting spacecraft, conducting scientific experiments in microgravity, and performing extravehicular activities (EVA), being the standard term traditionally used by the American (NASA) and Western European aerospace programs.
• 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.
• Spacecraft — A spacecraft, cosmic vessel, or complex flight craft structurally designed and equipped to navigate in extra-atmospheric space, transport human crews or scientific payloads, and perform interplanetary or interstellar exploration missions. A spacecraft integrates advanced propulsion, regenerative life support systems, thermal and radiation shielding, and automated guidance equipment necessary for survival and operation in the vacuum of space.