Beryllium
Beryllium is a chemical element with the symbol Be and atomic number 4. It is a relatively rare element in the universe, usually occurring as a product of the spallation of larger atomic nuclei that have collided with cosmic rays. Beryllium is used in various applications in the space and astronautical engineering field due to its unique properties, including its high melting point, low density, and stiffness. It is commonly used in the construction of lightweight structures, such as mirrors and support structures for telescopes and satellites. Beryllium is also used as a neutron reflector in nuclear reactors and as a moderator in nuclear weapons. However, beryllium is highly toxic and can cause lung cancer if inhaled, so proper safety measures must be taken when handling it.
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