House tells NASA to stop messing around, start planning two Europa missions
"As part of the mission to Europa, Culberson would also like to send a lander to the surface of the heaving, ice-encrusted world. This would allow scientists to better characterize the oceans below and, if the lander touches down near a fissure, possibly even sample the ocean. However, there has been some concern that having both an orbital spacecraft and a lander in a single mission would prove too challenging for a single rocket to deliver. So as part of the new House bill, the Europa mission is broken into two parts: an orbiter and, two years later, a lander."
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