The Moon - Lunar Orbiter 4
Eastern Limb of the Moon
Lunar Orbiter 4 view of the eastern limb of the Moon. The large
dark-floored crater towards the left is Mare Humboldtianum, with
a diameter of about 270 km. The north pole is at the top left.
The large dark feature at the bottom right is Mare Smythii.
(Lunar Orbiter 4, frame M-23)
Moon
Moon Geology
Impact Cratering