NAVIGATING THE MOON
The eight Moon maps on the following pages portray the Moon with north up. This is how it appears to naked-eye observers in the Northern Hemisphere. Depending on what type of telescope you use, your telescope image may be oriented differently. Also bear in mind that the Moon appears south up in the Southern Hemisphere.
East and west on these maps match the directions used for Earth, rather than those usually used for the sky. This convention was chosen by the Inter-national Astronomical Union, which agreed with NASA's astronauts that for people on the Moon, the Sun should rise in the east and set in the west.
You may sometimes see slightly more or less of the Moon than our maps show because the tilted, elliptical orbit of the Moon causes "librations," which give us occasional glimpses of extra territory around its limb edges.