Mare Insularum (the "sea of islands") is a lunar mare located in the Insularum basin just south of Mare Imbrium. The basin material is of the Lower Imbrian epoch, with the mare material of the Upper Imbrian epoch. 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. The rays from both Kepler and Copernicus protrude into the mare. It is located near the crater Fra Mauro.
Sinus Aestuum forms a northeastern extension to the mare.
Famous quotes containing the word mare:
“A harvest mouse goes scampering by,
With silver claws and silver eye;
And moveless fish in the water gleam,
By silver reeds in a silver stream.”
—Walter De La Mare (1873–1956)