Return To The Moon: Artemis 1 Mission

You could go your entire life without thinking about a collet. Indeed, you could go your entire life without even knowing what a collet is, and if we stopped right here you’d be no worse off. For the record, though, a collet is a small ring of metal, about the size of a fist, and, as NASA announced at a July 20 press conference, at the moment, it’s the biggest thing standing in the way of the U.S. having humans back on the surface of the moon sometime in the middle of this decade.