North Ray crater is a small crater in the Descartes Highlands of the Moon visited by the astronauts of Apollo 16. The name of the crater was formally adopted by the IAU in 1973. It is the largest crater sampled by astronauts during the Apollo program. North Ray cuts into the Cayley Formation of Imbrian age, but the crater itself is much younger, of Copernican age, based on the presence of rays. (See also section on age below.)