 Mare Cognitum. Fra Mauro is the gray region in the upper right. | |
| Coordinates | 10°30′S 22°18′W / 10.5°S 22.3°W |
|---|---|
| Diameter | 350 kilometers (220 mi)[1] |
| Eponym | Sea That Has Become Known, or Known Sea |
Mare Cognitum /ˈkɒɡnɪtəm/ (Latin cognitum, the "Sea that has Become Known") is a lunar mare located in a basin or large crater which sits in the second ring of Oceanus Procellarum. To the northwest of the mare is the Montes Riphaeus mountain range, part of the rim of the buried crater or basin containing the mare. Previously unnamed, the mare received its name in 1964 in reference to its selection as the target for the successful impact probe Ranger 7, the first American spacecraft to return closeup images of the Moon's surface.[1]
- ^ a b "Mare Cognitum". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.