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nasa's test mission just discovered its

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first circumbinary planet a world

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orbiting two stars instead of one

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named toi 1338-b it's nearly the size of

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saturn and orbits its stars every 95

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days

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the two stars orbit each other and

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consist of a small cool m dwarf and one

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much like the sun

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together they form what is called an

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eclipsing binary which means the stars

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regularly pass in front of each other

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from our point of view

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tess hunts for planets in these and

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other systems by looking for tiny

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regular dips in starlight called

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transits

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large star but spotting them in the data

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wasn't easy

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a high school intern examined hundreds

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of eclipsing binaries to search for

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planetary transits which can look

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similar to some of the eclipses

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ultimately he uncovered transits caused

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by the planet

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[Music]

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if you could orbit toi 1338-b you'd have

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a front row seat to see its suns eclipse

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each other every 15 days

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but the angle of the planet's orbit

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around the stars changes over time after

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2023 we won't see it pass in front of

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the stars for another 8 years

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tess will observe hundreds of thousands

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of eclipsing binaries so there may be