As stars age, they expand. That's bad news for planets orbiting close to their stars, according to a new study published in the Monthly Notices of the Royal Astronomical Society this month. The study suggests that planets closest to their stars, especially those that orbit their stars in just 12 days or less, are at a higher risk of being sent to their doom by their aging suns. The idea that a dying star might engulf or destroy planets is not new, but there have not been many detailed surveys