Glossary term: 月海
Description: 月海（mare）源自拉丁語，意為“海洋”，是月球上由玄武岩構成的一系列黑色平坦區域之一。這些區域被認為是古代火山噴發的結果，與淺色、古老、鋸齒狀的月球高地相比，它們留下了相對平滑平坦的地貌。它們的名字來源於其外觀，與平坦的海面十分相似。我們現在知道這些地區非常乾燥，沒有地表水。
靜海（Mare Tranquillitatis）是阿波羅 11 號登陸的地點，這是人類首次在月球上著陸的載人航天器。
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Term and definition status: The original definition of this term in English have been approved by a research astronomer and a teacher The translation of this term and its definition is still awaiting approval
This is an automated transliteration of the simplified Chinese translation of this term
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Related Media
Moon map from the NASA Clementine mission
Caption: A map of the Moon's surface constructed of images taken by the BMDO/NASA Clementine mission. The center of the image corresponds roughly to the center of the full moon. This map is a projection of the spherical moon onto a flat surface so the regions around the poles appear distorted, just as Antarctica appears distorted on a map of the Earth.
The large, dark patches in the center of the image are maria (singular mare). These are named after the Latin word for sea but they are not oceans like we have on Earth. Instead they are vast plains of basalt formed by lava that flowed out of volcanos on the moon billions of years ago. They appear darker and smoother than the older, lighter lunar highlands.
Credit: USGS Astrogeology Science Center;
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Mare Crisium - Sea of Crises
Caption: The image shows the lunar Mare Crisium, the “Sea of Crises,” as seen by NASA’s Lunar Reconnaissance Orbiter in 2015. The photo size is 750 × 750 km, about the size of Germany. Mare Crisium is located in the Moon’s Crisium basin, near the great Mare Tranquillitatis on the near side of the Moon. It is visible from Earth and is characterized by a relatively smooth and flat surface surrounded by cliffs and highlands. The basin that now contains the Mare Crisium was formed by a massive impact event likely during the Nectarian period approximately 3.9 billion years ago. During this time in lunar history, major basins including the Crisium basis were formed by large impact events. Later in lunar history, the basin was flooded by lava to form the dark and flat plain we see today. Its floor is about 1.8 kilometers below the typical lunar surface level. The study of lunar maria provides insights into the volcanic history and impact processes that have affected the Moon and other celestial objects.
Credit: NASA, Lunar Reconnaissance Orbiter
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