Before & after: Revealing Churyumov-Gerasimenko's jets
Adjusting the brightness of NavCam images reveals jets emanating from the comet. There are two jets clearly visible at the neck, but there is also a brighter background near the "body" of the comet at lower left, and a possible area of enhanced brightness to the right of the comet.
Here is a version of the image that has been processed to enhance the jets while maintaining the appearance of the comet nucleus:
ESA / Rosetta / NavCam / Emily Lakdawalla
Comet jets! NavCam view of comet Churyumov-Gerasimenko on September 2, 2014
A four-image mosaic of comet Churyumov-Gerasimenko taken by Rosetta on September 2, 2014 clearly shows at least two jets emanating from the "neck" region of the comet.