The Grand Canyon in Arizona got carved by water over millions of years of slow but steady erosion. Two similarly-sized canyons on the moon got carved by flying rocks in about ten minutes.

"Nearly four billion years ago an asteroid or comet flew over the lunar south pole ... on the edge of the Vallis Schrödinger canyon on the moon. Artistic rendering of astronauts standing on ...

But on the moon, where there’s no atmosphere, there’s another way to create a canyon: through an impact. Two such lunar canyons, Vallis Schrödinger and Vallis Planck, stretch over 270 km (168 ...

“Nearly four billion years ago, an asteroid or comet flew over the lunar south ... Arizona to create the Grand Canyon. The celestial object that plowed into the moon likely hit with a speed ...

Unlike the sudden appearance of the Moon canyons, the Earth’s Grand Canyon formed over millions of years as the Colorado River gradually eroded through the rock. Using data from Nasa’s robotic ...

“Nearly four billion years ago, an asteroid or comet flew over the lunar south ... Arizona to create the Grand Canyon. The celestial object that plowed into the moon likely hit with a speed ...