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  • BBC Sky at Night

    MOONWATCH

    Oct 22, 2020 2 minutes

    is one of the primary dark lava seas on the Earth-facing side of the Moon. The ‘Sea of Serenity’ makes a good pair with neighbouring 700km , the ‘Sea of Tranquillity’. Serenitatis is roughly circular and sits between Mare Imbrium to the west and Mare Tranquillitatis to the southeast. Less well defined to, a crater which appears to have an inner floor tilted up in the east. South of Posidonius is the dark, circular but broken form of 61km , resembling a less impressive version of the 400km x 260km Sinus Iridum, the ‘Bay of Rainbows’, located on the northwest shore of 1,250 km . Le Monnier is a crater infilled with lava from Mare Serenitatis.

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