Observing the Moon

By vitue of its inclination, the Moon will be seen in a zone about 5° either side of the elliptic. A Full Moon will be high in the Winter night sky and low in the Summer night sky (and a New Moon will be low in the Winter daytime sky and high in the Summer daytime sky). For similar reasons, for observers in Britain, the Moon will be in the sky for longer in the Winter than in the Summer.

Since 1961, the Moon's West is on our East, reversing the previous orientation. An observer on the Moon will now see the Sun rise in the East and set in the West. Also, nowadays, Mare Orientale is in the West.

Selenographic longitude is denoted as either east or west of the central meridian, or as positive or negative values respectively.


Relief is most prononuced near the terminator. This terminator moves at about half a degree every hour (12.2° per day).

in latitude