The Ocean of Storms of the Moon. Image courtesy of NOT and SO: M. Gålfalk, G. Olofsson, and H.-G. Florén.

Oceanus Procellarum, Latin for "Ocean of Storms", is a vast lunar mare on the western edge of the near side of Earth's Moon. Its name derives from the old superstition that its appearance during the second quarter heralded bad weather. Procellarum is the largest of the lunar maria, stretching 2500 kilometers across its north-south axis and covering roughly 4,000,000 km². Download high resolution version (801x376, 39 KB)The Ocean of Storms of the Moon. ... Download high resolution version (801x376, 39 KB)The Ocean of Storms of the Moon. ... The dome of the Nordic Optical Telescope. ... The Stockholm Observatory is an astronomical institution in Stockholm, Sweden, founded in the 18th century and today part of Stockholm University. ... Latin is the language originally spoken in the region around Rome called Latium. ... The Lunar maria (singular: mare, pronounced MAH-ray) are large, dark, basaltic plains on Earths Moon, formed by ancient basaltic flood eruptions caused by extremely large meteoroid impacts. ... Earth, also known as the Earth, Terra, and (mostly in the 19th century) Tellus, is the third planet outward from the Sun. ... Crust composition Oxygen 43% Silicon 21% Aluminium 10% Calcium 9% Iron 9% Magnesium 5% Titanium 2% Nickel 0. ... In astronomy, a phase of the Moon is any of the aspects or appearances presented by the Moon as seen from Earth, determined by the portion of the Moon that is visibly illuminated by the Sun. ... To help compare orders of magnitude of different surface areas, here is a list of areas between 1 million km² and 10 million km². See also areas of other orders of magnitude. ...

Like all lunar maria, Oceanus Procellarum was formed by ancient basaltic flood volcanic eruptions that covered the region in a thick, nearly flat layer of solidified magma. Unlike the other lunar maria, however, Procellarum is not contained within a single well-defined impact basin (although much of it is within the Procellarum Basin). Around its edges lie many minor bays and seas, including Mare Nubium and Mare Humorum to the south. To the northeast, Oceanus Procellarum is separated from Mare Imbrium by the Carpathian Mountains. Basalt Basalt is an extrusive igneous rock, sometimes porphyritic, and is often both fine-grained and dense. ... A volcano is a geological landform (usually a mountain) where magma (rock of the Earths interior made molten or liquid by high temperature along with a reduction in pressure and/or the introduction of water or other volatiles) erupts through the surface of the planet. ... This article is about the type of molten rock. ... The Sea of Clouds of the Moon. ... Mare Humorum (the sea of moisture) is a lunar mare. ... Oblique view of Mare Imbrium looking south towards Copernicus crater. ... Montes Carpatus is a mountain range that forms the southern edge of the Mare Imbrium on the Moon. ...

The unmanned lunar probes Surveyor 1, Surveyor 3, Luna 9 and Luna 13 landed in Oceanus Procellarum. Apollo 12 also landed in Oceanus Procellarum. Unmanned space missions are those using remote-controlled spacecraft. ... Surveyor 1 was the first lunar lander in the American Surveyor program that explored the Moon. ... Surveyor 3 was the third lunar lander of the Surveyor program that explored the Moon. ... Luna 9 was an unmanned space mission of the Soviet Unions Luna program. ... Luna 13 was an unmanned space mission of the Luna program, also called Lunik 13. ... Apollo 12 was the sixth manned mission in the Apollo program and the second to land on the Moon. ...

Sinus Roris

A northward extension of the Oceanus Procellarum has been given the latin name for "Bay of Dew". The IAU-defined selenographic coordinates of this bay are 54.0° N, 56.6° W, and the diameter is 202 km. Latin is the language originally spoken in the region around Rome called Latium. ... The International Astronomical Union (IAU) unites national astronomical societies from around the world. ... See Cartesian coordinate system or Coordinates (elementary mathematics) for a more elementary introduction to this topic. ...

The borders of this feature are somewhat indistinct. The bay proper is framed along the western edge by Markov and Oenopides craters, and to the north by Babbage and South craters. At the eastern edge it joins the Mare Frigoris. Markov is a lunar impact crater that is located in the northwestern part of the Moons near side, in the Sinus Roris region of the Oceanus Procellarum lunar mare. ... Oenopides is a lunar crater that is located near the northwest limb of the Moon, and so appears foreshortened when viewed from the Earth. ... Babbage is an ancient lunar crater that is located near the northwest limb of the Moon. ... South is a large lunar crater that is located in the northwest part of the Moon. ... Mare Frigoris (the sea of cold) is a lunar mare located just north of Mare Imbrium, and stretches east to north of Mare Serenitatis. ...

Many selenographers have taken liberties with the dimensions of Sinus Roris. Lunar maps often indicate a much larger region for this bay than the official dimensions. These can ranging out as far as the Gerard and Repsold craters to the west, Harpalus crater to the east, and as far south as 44° N latitude, approaching Mons Rümker. Gerard is a lunar crater that lies along the western edge of the Oceanus Procellarum near the northwest limb of the Moons near side. ... Repsold is a lunar crater that is located at the western end of the Oceanus Procellarum lunar mare. ... Harpalus is a young lunar impact crater that lies on the Mare Frigoris, at the eastern edge of the Sinus Roris. ... Latitude, denoted by the Greek letter φ, gives the location of a place on Earth north or south of the Equator. ... Mons Rümker is an isolated volcanic formation that is located in the northwest part of the Moons near side, at selenographic coordinates 40. ...

The area where the official coordinates place this bay has a generally higher albedo than the mare to the south, most likely due to deposits of ejecta from impacts to the north. The albedo is a measure of reflectivity of a surface or body. ...