NASA Has Committed to a Rocket for the Europa Mission—and It Won’t Be Ready on Time

By Jillian Kramer Just weeks after NASA’s Europa Clipper mission quietly received a formal commitment to a final cost and timeline from the agency, it looks increasingly like the spacecraft will not fly on its legally mandated megarocket, the Space Launch System (SLS)—at least, not in the timeline outlined by Congress—documents and experts confirm. Because of the …