The Sea of TRANQUILLITY is a dark spot located in the northern hemisphere of the moon! And if you think that's cool, check out these other moon facts!
The Sea of Tranquillity was the psot chosen as the landing spot for the Apollo 11 crew (that's Buzz and Neil).
The moon is almost 385,000km away from Earth and takes more than three days to get there ... but you'll need a rocket!
The Sea of Tranquillity is not a sea. Rather, it is a lunar mare. That is, a large plain formed long ago by a volcanic eruption.
It is said that when Neil Armstrong landed on the moon, there were only enough fuel in the lunar module to last another 30 seconds. Eek!