It was not utitl 1973 that Swiss astronomer André Maeder predicted that some binaries should exhibit the opposite phenomenon. According to both Newton's theory of gravity and Einstein's general theory of relativity, mass bends light. Therefore, Maeder says, if a small but massive star eclipses its companion, then the small star's gravity should amplify the other star's light so much that it overwhelms the eclipse-induced darkening.
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