Gas
In space and astronautical engineering, gas refers to a state of matter that is commonly found in the atmosphere of planets, moons, and other celestial bodies. Gases are characterized by their low density and high compressibility, which make them difficult to contain and manipulate in space. The study of gases in space is important for understanding the behavior of planetary atmospheres, as well as for designing spacecraft propulsion systems and life support systems. Gases are used as propellants in rocket engines, and are also used to provide breathable air and regulate temperature and pressure inside spacecraft. The behavior of gases in microgravity environments is of particular interest, as it can lead to unique phenomena such as fluid sloshing and combustion instability. Understanding the properties and behavior of gases in space is essential for the success of space missions and the exploration of the cosmos.
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