The James Webb Space Telescope may have solved a swollen planet mystery. Here’s how

A surprisingly low methane reservoir could explain how a planet around a nearby star became strangely bloated, according to new observations from the James Webb Space Telescope (JWST(. The finding shows that planetary atmospheres can inflate to remarkable amounts without resorting to esoteric theories of planet formation, astronomers say.

“The Webb data tells us that planets like WASP-107 b didn’t have to form in a strange way with a super small core and a huge gaseous envelope,” Michael Linean extrasolar planetologist at Arizona State University, said in a rack. “We can take something similar instead Neptunewith a lot of rock and not so much gas, just turn up the temperature and poof it to look like this.”

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