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Cosmology
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Here are entered works on earth, fire, water, and air, regarded by early natural philosophers as the four elements that constitute the material universe.
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Here are entered works on earth, fire, water, and air, regarded by early natural philosophers as the four elements that constitute the material universe.
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-- See Also the narrower term Space sciences Here are entered general works which include the requisite sciences for astronautical undertakings, for the scientific results of space exploration, and for the scientific applications of space flight. General works on the universe are entered under Astronomy. Special aspects are entered under particular subjects, e.g. Astronautics in meteorology; Cosmic physics; Outer space--Exploration; Space biology; Space medicine.
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