The Sea of Tranquility, known as "Mare Tranquillitatis" in Latin, is a large, dark area on the Moon's surface that is classified as a lunar mare, which are basaltic plains formed by ancient volcanic eruptions. It covers about 2.4 million square kilometers (around 930,000 square miles) and is one of the most studied regions of the Moon.
The Sea of Tranquility is particularly famous because it was the landing site of Apollo 11, the historic