To amplify your comment, here's a web page with documents from the science definition team -- the panel that decides what exactly the mission will study: https

To amplify your comment, here's a web page with documents from the science definition team -- the panel that decides what exactly the mission will study: https://solarsystem.nasa.gov/europa/sdt2013.cfm https://solarsystem.nasa.gov/europa/sdt2013.cfm A key document is the very granular "Science Traceability Matrix" which is very focused on "can instruments be made to satisfy these science goals" (zoom in to notice a lot of requirements flow-down from science goals): https://solarsystem.nasa.gov/europa/docs/Clipper_Trace_Matrix_V2.2_140609.pdf https://solarsystem.nasa.gov/europa/docs/Clipper_Trace_Matri... And regarding Europa, one particular item of concern has been, can markers of life be detected in a plume as sampled by an orbiter. Here's a recent workshop on the subject: https://astrobiology.nasa.gov/calendar/europa-plume-workshop/ https://astrobiology.nasa.gov/calendar/europa-plume-workshop... It's a colossal understatement to say that a standard design plus tailoring isn't really going to lift the burden of figuring out if detecting life in the plume is possible. But that said, there are re-usable components. Some of the spectral radiometers ("take photos") are largely re-used, also communications devices, etc.