'Strange guests' from another planet carry the same thing as on Earth
Objects that once passed through Earth's sky may representPhilae will land on the top of the comet 67P / Churyumov-Gerasimenko
The area 4 km above the top of the comet 67P / Churyumov-Gerasimenko will be the landing point of the Philae probe of the Rosetta spacecraft.