The Moon - Lunar Orbiter 4

The Davy crater chain on the Moon

The Moon
Lunar Orbiter 4 image of the Davy crater chain on the Moon. The chain stretches from Davy Y at left to the large, bright Davy G (diameter 15 km). Note the even spacing of the craters. The chain may be the result of secondary impacts, volcanic activity, or an impactor which broke apart shortly before impact, similar to Comet Shoemaker/Levy 9 on Jupiter. North is up. (Lunar Orbiter 4, frame 108-H2) 

Moon
Moon Geology
Cometary Impacts on Jupiter