Atom
In space and astronautical engineering, an atom is the smallest unit of matter that retains the chemical properties of an element. Atoms are composed of a nucleus, which contains positively charged protons and neutral neutrons, surrounded by negatively charged electrons. Atoms are important in space and astronautical engineering as they are the building blocks of all matter, including the materials used in spacecraft and satellites. Understanding the behavior of atoms is crucial in the design and operation of spacecraft, as well as in the study of space phenomena such as radiation and plasma.
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