For those of us who spend our nights nudging a telescope across the sky, or setting coordinates to image, the Andromeda Galaxy (Messier 31) is an old friend. We know its dust lanes and its satellite galaxies by heart. Some of us may even know the visual globular clusters that can be seen in a telescope. But while we were looking at the big picture, a massive star in one of Andromeda's spiral arms—M31-2014-DS1—did something revolutionary: it disappeared.
Full write up and LINK to the article over at EadsyAstronomy.
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