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Theoretical approaches

Theory is just as important as observation in astronomy. It is required for the interpretation of observational data, for the construction of models of celestial objects and their properties, and for guiding further observations. Theoretical astrophysics is based on the laws of physics that have been validated with great precision through controlled experiments. Application of these laws to specific astrophysical problems, however, may yield equations too complex for direct solution. Two general approaches are then available. In the traditional method, an idealized description of the problem is formulated, incorporating only the major physical components, to provide equations that can be either solved directly or evaluated numerically. Alternatively, a computer program that will explore the problem numerically can be devised. Computational science is taking its place as a major division alongside theory and experiment.

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