Moon Craters Appearing Faster Than Thought

Could falling space rocks imperil future moon missions?

October 13, 2016
9:46 AM EDT
A 39-foot (12 meter) diameter impact crater formed between Oct. 25, 2012, and April 21, 2013, and was discovered in a before-and-after image created from two Narrow Angle Camera (NAC) images. The image covers an area 1,200 m wide. Credit: NASA/GSFC/Arizona State Univ.
The top image shows a low-reflectance splotch, while the bottom image shows a high-reflectance splotch that was created by a small impactor or secondary ejecta from a larger impact. In either case, the top few centimeters of the regolith (soil) was churned. Credit: NASA/GSFC/Arizona State Univ.