science ๐ช Planet 23x heavier than Earth is still rock?
Researchers confirmed exoplanet GJ 523b defies typical gas-giant rules by maintaining a solid rocky structure. This planet orbits its star and is located in the system, with a mass of 23.5 Earth masses and a radius of 2.55 Earth radii. Measurements were taken using TESS, WIYN, and JWST, with the system being about 170 million years old. Current formation models struggle to explain how such a massive body avoided becoming a gas giant. Future JWST observations are expected to help clarify which of the two competing theories is correct.