The moon has 4 seas. The sea of rain, the sea of tranqulity,sea of crises and the sea of serenity Surely the moon has 12 seas or MARES Showers / Rain Cognitus Moisture Serenity Tranquility Fertility...
"Moon Seas" is another term for "Moon Marias". Marias (singular: Mare) were formed by ancient volcanic eruptions on the Moon. They were called "Marias", which is Latin for "Sea", by early astronomers...