The "Yunhai Basin" where Yunhai is located has been identified as Pre Jiuhai Period As a part of the system, the surrounding geology of the basin is Early Yuhai , the lava forming the cloud sea is formed in Late Yuhai 。 Moon Sea To the west is Elatosnian Blio crater, which means that the crater Moon Sea Younger. Located on the edge of the south of the moon is the Pitatus crater, and Tycho Ring Mountain The bright ray beam runs through the entire moon sea from south to northwest. In the southern part of the month, between the Burt crater and the Sabit crater, there is also a fault Structure - 125km long and 240m high Straight wall 。 Like most other lunar seas on the moon, Cloud Sea was also named by Italian astronomer Giovanni Battista Riccioli, whose naming system created in 1651 has become a standardized lunar place name. Previously, William Gilbert It has been included in the "Meridionalis" in his 1600 lunar map, and the Dutch astronomer Michael Florent van Langlun marked it as "Borbonicum" in his 1645 map. The first image released was in 2009 Lunar Reconnaissance Orbiter The lunar highland 200 kilometers south of the sea of clouds was photographed. In September 2013, Spanish astronomers observed and recorded the impact event of a large rock hitting the surface of the lunar cloud sea.
