Mare Tranquillitatis is a lunar mare that sits within the Tranquillitatis basin on the Moon. It contains Tranquility Base, the first location on another celestial body to be visited by humans.
The Sea of Tranquility of the Moon
The Apollo 11 landing site at center, facing west, with the 22-kilometer-wide Maskelyne crater in right foreground
The Moon with Mare Tranquillitatis highlighted and the first crewed lunar landing marked
Three views of Mare Tranquillitatis, taken by the mapping camera of the 1972 Apollo 17 mission
The Moon is the only natural satellite of Earth. It orbits around Earth at an average distance of 384,399 kilometers, a distance roughly 30 times the width of Earth. It completes an orbit in relation
Mare Tranquillitatis
…Mare Tranquillitatis (Latin for Sea of Tranquillity or Sea of Tranquility) is a lunar mare that sits within the Tranquillitatis basin on the Moon. It contains Tranquility Base, the first location on another celestial body to be visited by humans. The mare material within the basin consists of…
The near side of the Moon with the lunar north pole at the top
Size comparison of the main moons of the Solar System with Earth to scale. Nineteen moons are large enough to be round, several having subsurface oceans and one, Titan, having a considerable atmosphere.
Surveyor 7 observes levitating dust, a phenomenon named Lunar horizon glow can be seen
Astronaut Charles Duke working on the Moon with his suit covered in lunar dust. Lunar dust is highly abrasive and can cause damage to human lungs and nervous and cardiovascular systems.