An international team of astronomers has announced a baffling discovery never seen before: an extraordinary amount of dust around a nearby star mysteriously disappeared. An artist's conceptualization of the dusty TYC 8241 2652 system as it may have appeared several years ago, when it was emitting large amounts of excess infrared radiation, left, and as it might appear now after most of the surrounding dust has disappeared (Gemini Observatory/AURA...