Posted: Sat, Sep 9, 2017, 10:54 AM ET (1454 GMT)
NASA is studying alternative, and potentially less expensive, options for a Europa lander mission. Agency officials said at a meeting of a science advisory group Wednesday that while the lander passed a mission concept review in June, NASA had asked the team to study different options for the mission that trade off science, risk and cost. NASA has not provided an estimate of the cost of the mission, but it is widely believed to cost several billion dollars in its current form. NASA hasn't set a timetable for completing that study of mission options, but has postponed a planned announcement of opportunity for instruments to fly on that mission.

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