Crater chains on our Moon and Phobos resembles S.Levy Comet impact on Jupiter 1994.

see also: https://www.sciencedaily.com/releases/2016/08/160830113234.htm 

At the same time it is a n extra support for the multiple nano ( new paradigm) black hole content of Comet 67P CG.

see: https://www.academia.edu/8100058/THE_ORIGIN_OF_CIRCULAR_CRATERS_AT_COMET_67p_C-G 

Crater chains on our Moon and Mars’s moon Phobos resembles the Shoemaker-Levy 9 impact on Jupiter 1994.

Conclusion: Shoemaker Levy 9 splitting and crashing into planets or stars seems to be common in space around stars.