At left, the Rosetta launch in Kourou on 2 March 2004. At right, an image of the comet 67P/Churyumov-Gerasimenko taken by the probe on August 2014 from 79 km. The size of the comet is about 4 km.
Rosetta is the first probe whose mission (Philae) is landing on a comet and thus following it for months during its revolution around the Sun.
Rosetta's journey to comet 67P/Churyumov-Gerasimenko took more than 10 years!
The comet 67P/Churyumov-Gerasimenko: at left, water sublimated by the Sun and at right a detail of the surface.