Astronomers have discovered a planet unlike any other ever found, one that loops widely around one star that is locked in a gravitational embrace with two others in a triple-star system, creating a curious celestial ballet. The findings, published on Thursday in the journal Science, challenge current notions about what makes a planetary system viable. With three stars in the system, the massive planet would experience triple sunrises and triple sunsets during one season and all daylight in another. Since the planet’s orbit is very long, each season lasts for hundreds of years.
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