Once upon a time - Rosetta And Philae 

The complete story of Rosetta and Philae. They took off in 2 March 2004. During its journey to the comet, the spacecraft flew by Mars and the asteroids 21 Lutetia and 2867 Šteins. On 6 August 2014, the spacecraft reached the comet 67P/Churyumov-Gerasimenko.
This is their story.