A stunning view of the Hathor and Seth regions on the comet, taken by the Rosetta spacecraft. The cliffs of Hathor loom in the background. Some jet activity can also be seen in the closer foreground. See also the Rosetta blog post here.
The impact of comet Shoemaker-Levy 9 into Jupiter in 1994 was a spectacular event for astronomers. The scars in Jupiter’s atmosphere lasted for weeks afterward; while those have long since faded, there are still other features of the impact visible even now, it was announced last Tuesday.