Astronomers have discovered three Earth-sized planets in a tight binary star system. This finding challenges theories that such systems are too chaotic for planets. The system is the first known with planets transiting both of its stars. The discovery was made using NASA’s TESS telescope and confirmed by ground observatories. It provides a new natural laboratory to test planet formation models. In the vast cosmic ocean, a discovery 190 light-years away is forcing scientists to tear up the old rulebook on how planets form. An international team of astronomers has confirmed the existence of three Earth-sized planets orbiting within a binary star system known…

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