The Not-So-Bloated Exoplanet HAT-P-1b

When the planet was announced, it was said to represent a new kind of planet because it was so large. That was annoying because such planets were in fact already known (including HD 209458 b, "Osiris", the first-known transiting planet). Even more, turns out the planet is not so inflated. Its radius is "only" 1.20 times that of Jupiter.

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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