This tiny iron-rich world is extraordinarily metal

Astronomers have spotted the tiniest, most metal-based planet yet — an iron-rich world that is 9 parsecs away from Earth and zips around its star once every 8 hours. The planet, known as GJ 367b, is three-quarters the size of Earth, but much denser. Its temperature reaches a searing 1,500 ℃ during the day — nearly hot enough for its iron to begin to melt.