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The Sun's magnetic field has been traced out far beyond the orbit of Pluto and even Sedna.
Hypothesis
A statement that attempts to predict or to account for a set of phenomena; scientific hypotheses specify relationships among events or variables and are empirically tested.
Axiom
A statement or proposition that is regarded as being established, accepted, or self-evidently true.
Corollary
A proposition that follows from one already proven, often seen as a natural consequence or result.
Theory
A system of ideas intended to explain something, based on general principles independent of the thing to be explained.
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