As astronauts prepare for south-polar landings, a new look at the Moon’s biggest crater points to a pivotal moment in lunar history—and to the rocks you’ll want sampled next. A study led by Jeffrey ...

A team of planetary scientists has developed a promising new way to peer beneath the dusty surface of Mars and other planetary bodies. A new study finds that ejecta blankets -- the layers of rock and ...

The South Pole-Aitken impact basin on the far side of the Moon formed in a southward impact (toward the bottom in the image). The basin has a radioactive “KREEP-rich” ejecta blanket on one side of the ...

The Moon’s largest and oldest known crater, the South Pole–Aitken (SPA) basin, is revealing secrets that could transform our understanding of how the Moon, and possibly other rocky bodies, evolved.