English: en:Mare Insularum. The mare is bordered by the craters Copernicus on the East, and Kepler on the west. Oceanus Procellarum joins the mare to the southwest. Copernicus is one of the most noticeable craters on the moon, seen as the white region on the photo. The rays from both Kepler and Copernicus protrude into the mare. The northern edge of Mare Cognitum is visible at the bottom of the photo, and Fra Mauro is the grey patch in the lower right.