The Dense Rocky Mantle of Super-Earth Exoplanet Kepler-442b
A World of Geological Stability Located approximately 1,200 light-years from our solar system in the constellation Lyra, Kepler-442b represents one of the most intriguing rocky worlds identified by modern transit photometry. Classified as a super-Earth, it possesses a mass roughly 2.3 times that of our home world and a radius approximately 1.3 times larger. These physical dimensions suggest a high-density, silicate-rich composition, likely featuring a substantial iron-nickel core encased within a thick, rocky mantle that accounts for the vast majority of its bulk. The gravitational profile of Kepler-442b is significantly more intense than what is found on terrestrial worlds in the inner solar system. Given its mass and radius, the surface gravity is calculated to be roughly 30% higher than Earth's. This increased gravitational pull has profound implications for the planet's geology. Tectonic activ...