NASA’s flying to an ocean world. Its spacecraft is giant.

NASA’s flying to an ocean world. Its spacecraft is giant.

A NASA probe, the length of a basketball court, is headed to the tantalizing world Europa. Planetary scientists are confident this moon of Jupiter harbors a deep ocean. A looming question is whether it hosts the ingredients and conditions to support life. With around 50 close flybys of the planet, the sizable craft — the…