Ironically, this indirect evidence of a destructive planetary collision could also be the first indication that planetary systems can form around close binary stars.

更讽刺的是，这个毁灭性的行星对撞，很可能也是行星系统有可能在密近双星周围形成的首个间接证据。

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These binary stars likely formed close together, and have been orbiting one another since their birth, the researchers said.

MSN: 'Impossible' stars found in our galaxy - Technology & science - Space - Space.com | NBC News