The Scorched Volcanic Basalt Plains of Exoplanet GJ 357 b
Located approximately 31 light-years away within the constellation Hydra, GJ 357 b represents one of the most significant discoveries in modern exoplanetary science. As a super-Earth with a mass roughly 1.84 times that of our home world, this celestial body orbits its M-dwarf host star with such proximity that it has become gravitationally locked. This phenomenon forces one hemisphere into a permanent state of daylight, while the opposing side remains shrouded in eternal shadow, creating a thermal divide that dictates the planet's entire physical evolution. The surface of GJ 357 b is characterized by its extreme proximity to its host star, resulting in an equilibrium temperature estimated to be around 490 Kelvin (217 degrees Celsius). Geologically, the world is dominated by expansive basaltic plains, reminiscent of the ancient mare found on the Moon, yet subjecte...