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A Clingy, Cotton Candy Exoplanet Is Causing Its Host Star to Flare Up

Learn about new observations that reveal an exoplanet is destroying itself by cuddling up to its host star, in an astronomical first.

ByStephanie Edwards
Being bombarded with so much high-energy radiation does not bode well for HIP 67522 b. The planet is similar in size to Jupiter but has the density of candy floss, making it one of the wispiest exoplanets ever found. Over time, the radiation carried by the flares is eroding away the planet’s wispy atmosphere, meaning it is losing mass much faster than we thought. In the next 100 million years, HIP 67522 b could go from an almost Jupiter-sized planet to a much smaller Neptune-sized planet. (Image Credit: Janine Fohlmeister (Leibniz Institute for Astrophysics Potsdam)) Janine Fohlmeister (Leibniz Institute for Astrophysics Potsdam

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Whether it’s an ex, a friend, a child, or a coworker — we’ve all experienced a clingy person in our lives. They revolve around you like a planet to a star, demanding your energy and slowly draining the life out of both of you. And as it turns out, that comparison might be more fact than simile.

For the first time, astronomers have observed an exoplanet orbiting close enough to its host star to trigger flares of radiation. The new study, published in Nature, describes the clingy planet, HIP 67522 b, as having a death wish, as its wispy mass is slowly deteriorating thanks to its proximity to the star.

“The planet seems to be triggering particularly energetic flares,” said Ekaterina Ilin, from the Netherlands Institute for Radio Astronomy, in a press release. “The waves it sends along the star’s magnetic field lines kick off flares at specific moments. But ...

  • Stephanie Edwards

    As the marketing coordinator at Discover Magazine, Stephanie Edwards interacts with readers across Discover's social media channels and writes digital content. Offline, she is a contract lecturer in English & Cultural Studies at Lakehead University, teaching courses on everything from professional communication to Taylor Swift, and received her graduate degrees in the same department from McMaster University. You can find more of her science writing in Lab Manager and her short fiction in anthologies and literary magazine across the horror genre.

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