## When Stars Engulf Rocky Planets, Beryllium Gives It Away Binary stars are born in the same cloud of molecular gas, and should share the same chemical composition. But sometimes they don't. Is this because of minor differences in the protostellar clouds? Or is it because some stars have eaten, or engulfed, rocky planets? If rocky planets are regularly consumed by their stars that's a bad sign for habitability. An international team of researchers have found a way to determine if stars have eaten rocky worlds that strayed too close. It's based on Beryllium, a rare element that makes up a…