That's weird... WASP-1, the parent star of the very large planet WASP-1b, appears to be very similar to HD 149026, whose super-hot planet is anomalously dense. Apparently HD 149026 b's properties cannot be explained simply by the star's excessive metallicity.

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Science is a way of trying not to fool yourself. The first principle is that you must not fool yourself, and you are the easiest person to fool.
-- Richard Feynman