A Planet With Three Suns?

Twinkling some 450 light-years away in the constellation Taurus is a complex starry trio known as GG Tau A. Two of the triad’s three stars closely circle one another, like a classic binary pair. But that pair also swings around the third star, creating a turbulent environment that seems like the last place you’d expect to find hints of planet formation.

Except that is exactly what astronomers might be seeing.

Imagine, for a moment, a world with three suns. Shadows would come in triplets, the suns would be continually eclipsing themselves, sunrises and sunsets would be spectacularly variable. We don’t know of any such worlds yet, but new observations suggest ...

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