Yikes - like I don't know Europa doesn't have much of an atmosphere
That's why I said a modified version of Huygens, not a duplicate. And I think we
would be better off with small probes scattered all over. Maybe they can each
take a different function and return data on different aspects of the moon. And
when I mean small, I mean small.
Penetrators need more than the few lousy chances they were given. I think they
have the best chance for going along as a relatively late addition on such a mission
if you want something that doesn't require retrorockets and such.