Nemesis

This moon is approximately 4,000 miles in diameter and orbits around the gas giant, Ionus. The moon no longer rotates on its axis, held still by the gravity of the enormous planet. The surface is mostly ice, oceans of nitrogen and oxygen frozen by subzero temperatures. What solid land masses do exist are gray and broken, having been heavily cratered by meteoric activity. A very thin, heavily ionized atmosphere envelops the moon, comprised mostly of ammonia, oxygen and nitrogen, formed by both the melting of the moon's frozen oceans that face the planet as well as the bombardment of solar radiation on the massive ice packs. The ionization has resulted in fierce, perpetual electrical storms which rain down bolts of lightning to the surface with incredibly high frequency.