Mercury

Mercury, the innermost planet, is a terrestrial world bearing scars from eons of cosmic bombardment. Its crater-riddled surface tells a tale of relentless impacts, with the colossal Caloris Planitia spanning a third of the planet's diameter. Thrust faults have etched expansive rupes across the landscape, while the remnants of violent collisions paint bright ray systems. Despite its diminutive size, Mercury boasts a surface gravity comparable to Mars. Named after the fleet-footed Roman messenger god, this rocky sphere silently orbits the Sun, forever bearing witness to the Solar System's tumultuous past. As the closest celestial neighbor to our star, Mercury endures the harsh embrace of solar radiation and extreme temperature fluctuations.