Looking for Earth 2.0 in binary systems

While astronomers have found thousands of exoplanets over the last few decades, the true prize continues to elude them—they have yet to find an Earth-mass, rocky planet orbiting in the habitable zone of a sun-like star. That's partially due to cosmic geography—around half of all sun-like stars near us aren't alone. They have one or more companion stars that complicate their orbital dynamics, as well as those of any planets they might host.

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