Why it is called Sea of Tranquility to an area of the moon that has no water?
“@VillarinoRomero: #preguntalealaluna Why it is called Sea of Tranquility to an area of the moon has no atmosphere to cause water or changes in it?”
The lunar seas are dark areas of the visible surface of the moon due to outcrops of basaltic magma. They were called seas by ancient astronomers to assume that it was similar to large areas of the Earth water. Examples: mare Serenitatis, Tranquillitatis and Foecunditatis.