Europa (Jupiter II) is the smallest of the four Galilean moons orbiting Jupiter, and the sixth-closest to the planet of all the 79 known moons of Jupiter. It is also the sixth-largest moon in the Solar System. Europa was discovered in 1610 by Galileo Galilei and was named after Europa, the Phoenician mother of King Minos of Crete and lover of Zeus (the Greek equivalent of the Roman god Jupiter).
Following Doctor Manhattan's departure from Earth in 1985, he desired to travel the universe in search of a place to create life on another world. Manhattan ultimately chose Europa as it was the only place where lifeforms could exist in the Solar System. With a wave of his hand Manhattan manifested a gossamer sheet of vapory atmosphere which thicken into a blue sky, transformed the parched tundra into a fertile savanna, with vast swards of green spreading across the moon's cold arid surface.
Manhattan eventually created his version of "Adam and Eve" in the image of a young English couple that Manhattan met as a child when he stayed at their manor as a refugee following his retreat from Germany during World War II. The couple gave a young Jon Osterman a Bible and told him to make it his life's purpose to create something beautiful. Manhattan would fulfill that promise seven decades later and 390 million miles away.
He crafted their bodies from the microbes in the water and by virtue of accelerated biomechanical maturation went from fetuses to fully grown adults. Manhattan gave them higher brain function, instantaneous speech, and self-awareness. Manhattan then brought them a place in which to live, a manor house.