About The Author

Andy received his PhD from the U. of Arizona in 1998, and after postdoc stints at UC Berkeley and The Carnegie Institution of Washington, joined EAPS in 2003. Andy’s research utilizes numerical modeling to understand a variety of time-dependent geodynamical processes that involve viscous flow and conductive cooling, including terrestrial projects dealing with crustal and mantle rheology, postseismic processes, and earthquake triggering, and planetary projects such as the full evolution of impact basins from transient crater formation through isostatic adjustment and faulting associated with lava emplacement and cooling.

The Moon’s Bright Streaks Explained

Looking up at the Moon, you might notice it’s crisscrossed by bright streaks that originate from some of the younger craters that cover the surface. These are known as crater rays, and they can be found on many planetary bodies, including the Moon, Mars, Mercury, and several icy satellites. Given that the rays trace back