McAuliffe is a small lunar impact crater that is located. It lies within the inner ring of the double-ringed walled plain Apollo, about one crater diameter to the northeast of the crater Resnik. To the southeast of it lies the crater pair of Jarvis and McNair. McAuliffe is a bowl-shaped feature with a roughly circular rim. (wikipedia entry)
A crater is a circular depression likely created by an impact event. On the Moon they are named after deceased scientists, polar explorers, astronauts or cosmonauts.