Kepler lies between the Oceanus Procellarum and Mare Insularum. With small telescopes or binoculars it is best viewed with a 23-20% Full Moon (or with the lunar terminator nearby)
Kepler (Latin Keplerus) is a lunar impact crater that lies between the Oceanus Procellarum to the west and Mare Insularum in the east. To the southeast is the crater Encke. Kepler is most notable for the prominent ray system that covers the surrounding mare. The rays extend for well over 300 kilometers, overlapping the rays from other craters. Read more