The four images that make up this montage of comet 67P/Churyumov–Gerasimenko were taken on 26 September by the ESA’s Rosetta spacecraft. Rosetta was about 26 km from the center of the comet. The picture shows a region of jet activity can be seen at the neck of the comet. These jets are originating from several locations. They are a product of ices sublimating and gases escaping from inside the nucleus.
The overlapping and slightly dissimilar angles of the four images in the montage are a result of the comet rotating as images were taken in the sequence (about 10° over 20 min) and the spacecraft’s movement as well.
Image Credit: ESA