Did it launch a probe of it's own? Turnabout, fair play, and all that.
Rosetta probe spots Comet 67P being buzzed by boulder
The European Space Agency (ESA) has spotted a boulder buzzing Comet 67P/Churyumov–Gerasimenko. The rock passed by on July 30th and as the .GIF below shows it headed off into space at decent speed. The images below were captured by Rosetta's OSIRIS narrow-angle camera, which only managed to get three frames of the event. The …