The moon and dark stains on it have always interested the people. Galileo Galilley was the first to call these stains “seas”. He was the first to study the Moon with the help of a telescope and perhaps he was very much amazed by the vast smooth fields with the chains of mountines and rages on the Moon’s surface. He even noticed some kind of waves on them but the time passed and these waves did not change their positions. Galliley even then realized that these moon seas were not actually of liquid as they were just valleys. As it turned out later, they consist of basalt or in other words solidified lava which existed there when the Moon was tectonically active.
The names of these seas are of Latin origin and are still used in science in Latin. They occupy nearly 17 per cent of the whole Moon’s surface. They are called maria. The largest seas are - Mare Tranquillitatis, Crisium, Foecunditatis, Nectaris, Nubium, Humorum, Imbrium, and Serenitatis.
So when looking on the moon try to find some of them as people many centuries ago did.
