A Jupiter-like planet may have survived a violent outburst from its host star, saving it from a fate our planet is destined for in 5 billion years.
A Jupiter-like planet located 520 light-years from Earth may be an unlikely survivor after its host star had a temper tantrum.
Halla orbits Baekdu at a distance about half that between the Earth and the sun at 0.46 astronomical units, or 42,759,659 miles . Halla is considered a “hot Jupiter,” a classification for exoplanets similar in size to Jupiter that have higher temperatures given how closely they orbit their host stars.
“Engulfment by a star normally has catastrophic consequences for close orbiting planets. When we realised that Halla had managed to survive in the immediate vicinity of its giant star, it was a complete surprise,” said study coauthor Dr. Dan Huber, Australian Research Council Future Fellow at the University of Sydney and associate professor at the Institute for Astronomy of the University of Hawaii at Manoa, in a statement.
When the research team realized the star was likely once larger than the current orbit of the planet, they carried out follow-up observations in 2021 and 2022 using the W. M. Keck Observatory and the Canada-France-Hawaii Telescope atop Mauna Kea in Hawaii. Now, astronomers are trying to determine if it’s possible that the planet could withstand such a cataclysmic stellar event.
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