the core of a planet

Mercury as photographed and mapped by the MESSENGER spacecraft

Mercury was much more magnetized: the ancient field was 50–100 times stronger

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3D models indicate that about 3.7 billion years ago, a much stronger dynamo operated on Mercury than today. The finding narrows down possible explanations for the origin of the ancient field and indicates intense convection in the core.
An artist's concept of WASP-107 b shows turbulent atmospheric mixing within the planet's gas envelope. Credit: Roberto Mollar Candanosa/Johns Hopkins University NASA, ESA, CSA, Ralf Crawford (STScI)

The Webb Space Telescope offers the first glimpse into the interior of an extrasolar planet

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Methane found in WASP-107 b reveals core mass and stormy sky
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