Gases
In space and astronautical engineering, gases refer to any substance that is in a gaseous state at standard temperature and pressure (STP) and is used for propulsion, life support, or other applications. Gases are commonly used as propellants in rocket engines, where they are combusted with an oxidizer to produce thrust. They are also used in life support systems to provide breathable air for astronauts and to regulate the temperature and pressure inside spacecraft. In addition, gases are used in various scientific experiments and observations, such as in telescopes and spectrometers, to analyze the composition and properties of celestial objects. The behavior of gases in space is influenced by factors such as temperature, pressure, and gravity, and their properties can be modeled using equations of state and other thermodynamic principles.
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