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Monster rocky exoplanet could let us glimpse the heart of Jupiter

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By Leah Crane Neptune-sized planets don’t normally orbit close to their starESOAstronomers have discovered what seems to be the core of a once-mighty gas giant, devoid of the thick shroud of gas that once surrounded it. This huge but decrepit world, the first we’ve seen of its kind, could help us learn about how planets…

By Leah Crane

Large rocky planet

Neptune-sized planets don’t normally orbit close to their star

ESO

Astronomers have discovered what seems to be the core of a once-mighty gas giant, devoid of the thick shroud of gas that once surrounded it. This huge but decrepit world, the first we’ve seen of its kind, could help us learn about how planets are formed.

David Armstrong at the University of Warwick, UK, and his colleagues found this strange planet, called TOI-849b, using NASA’s Transiting Exoplanet Survey Satellite (TESS). TESS watches distant stars for periodic dips in their light that occur when a planet passes in …

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