
Substances
In space and astronautical engineering, substances refer to any material or matter that exists in the space environment. This includes gases, liquids, solids, and plasma. Understanding the behavior and properties of substances in space is crucial for designing and operating spacecraft and space systems. For example, the behavior of propellants and coolants in microgravity environments can be significantly different from their behavior on Earth. Additionally, the interaction between substances and spacecraft surfaces can cause contamination and degradation of materials over time. Therefore, space engineers must carefully select and test materials to ensure their compatibility with the space environment. Furthermore, the study of substances in space can also provide insights into the formation and evolution of celestial bodies, such as planets and stars.
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