Key

1 Mare Imbrium (Sea of Showers)

Coordinates: 32.8°N 15.6°W Diameter: 1,146km (712mi) A large circular sea, Mare Imbrium is immediately visible to the northeast of the great sea Oceanus Procellarum. Given its size, it can be picked out quite easily with the naked eye.

2 Oceanus Procellarum (Ocean of Storms)

Coordinates: 18.4°N 57.4°W Diameter: 2,592km (1,611mi) Not too tricky to spot with the naked eye, Oceanus Procellarum is best viewed when the Moon is full or when the Moon makes its morning appearance in the waning or last quarter phase.

3 Mare Tranquillitatis (Sea of Tranquillity)

Coordinates: 8.5°N 31.4°E Diameter: 876km (544mi) The sea where Neil Armstrong made the first-ever human footprint on the Moon. Visible during the full, first quarter, waxing gibbous and also the waning phase.

4 Mare Crisium (Sea of Crises)

Coordinates: 17.0°N 59.1°E Diameter: 556km (345mi) Fairly easy to pick out with the unaided eye, Mare Crisium is oval shaped and located to the east of Mare Tranquillitatis. It’s visible to us on Earth during the first quarter, full and waxing phases of the Moon.

5 Mare Vaporum (Sea of Vapours)

Coordinates: 13.3°N 3.6°E Diameter: 242km (150mi) Close to Mare Serenitatis, this sea’s dark appearance makes it easily detectable with the naked eye. It can be found close to the Moon’s centre.