page_title: Mare Serenitatis
hierarchical_section_title: Mare Serenitatis
caption_attribution_description: English: Mare Serenitatis sits just to the east of Mare Imbrium. It is located within the Serenitatis basin, which is of the Nectarian epoch. The material surrounding the mare is of the Lower Imbrian epoch, while the mare material is of the Upper Imbrian epoch. The mare basalt covers a majority of the basin and overflows into Lacus Somniorum to the northeast. The most noticeable feature is the crater Posidonius on the northeast rim of the mare. The ring feature to the west of the mare is indistinct, except for Montes Haemus. Mare Serenitatis connects with Mare Tranquillitatis to the southeast.
context_page_description: Mare Serenitatis is a lunar mare located to the east of Mare Imbrium on the Moon. Its diameter is 674 km.
context_section_description: Mare Serenitatis /sɪˌrɛnɪˈteɪtɪs/ (Latin serēnitātis, the "Sea of Serenity") is a lunar mare located to the east of Mare Imbrium on the Moon. Its diameter is 674 km (419 mi).
caption: Photograph of Mare Serenitatis
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