U.S. planetary scientists briefed a NASA advisory panel on concepts for a mission to Jupiter's moon Europa that would cost half as much as the $4.7 billion Jupiter Europa Orbiter flagship concept NASA shot down in 2011 after the White House announced plans to shrink the agency's planetary program. The concepts presented Oct. 3 to the NASA Advisory Council's planetary science subcommittee included an orbiter and a more expensive craft dubbed Clipper that would perform 32 flybys of the icyjovian moon.
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