'The interior of the planet must be significantly hotter than we thought,' said researcher David Sing.
Astronomers may have finally figured out why a distant exoplanet with the density of a microwaved marshmallow has such a fluffy atmosphere.The planet, named
b was first spotted in 2017 orbiting its star at a distance of about 5.1 million miles—rather close compared to Earth's 94 million-mile orbit—completing an orbit around the star once every 5.7 days. b had a very small, rocky core surrounded by a huge mass of hydrogen and helium,' Luis Welbanks, a researcher at Arizona State University and co-author of one of the papers, said in a statement. 'But it was hard to understand how such a small core could sweep up so much gas, and then stop short of growing fully into a Jupiter-mass planet.'According to the papers,
b got really interesting, because we didn't know why the methane levels were so low.'According to data collected by the James Webb Space Telescope,
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