Which comet was studied intimately by the European Space Agency’s *Rosetta* mission?

Answer

Comet 67P/Churyumov–Gerasimenko.

The European Space Agency launched the *Rosetta* mission with the explicit goal of gaining intimate knowledge regarding the composition of a comet. This specific mission successfully studied Comet 67P/Churyumov–Gerasimenko over an extended period. The data gathered from this study provided crucial confirmation that comets are indeed primitive bodies, retaining the original chemical makeup derived from the early solar nebula.

Which comet was studied intimately by the European Space Agency’s *Rosetta* mission?
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