Exoplanets: Extremely dense world with an enormous iron core has an 8-hour year

By Leah Crane The exoplanet GJ 367b orbits its star in an extremely short time SPP 1992 (Patricia Klein) An extraordinarily dense exoplanet seemingly made mostly of iron has joined a group called the ultrashort-period planets that orbit so close to their stars that their years are less than one Earth day long. Kristine Lam, … Read more