NASA's huge spacecraft will soon launch to alluring ocean world

Some 480 million miles away, an ocean — harboring perhaps twice the water of Earth's seas — sloshes beneath the icy surface of Europa. NASA's going there. This moon of Jupiter has long intrigued planetary scientists, as a number of missions have swooped by the world's cracked, icy crust. Now, for the first time, a spacecraft is dedicated to investigating the moon. It's slated to launch in October."Almost time to spread our wings!" NASA posted online this week. "At @NASAKennedy, our s