The dark and relatively featureless lunar plains which we can seen with the naked eye are called maria (Latin for "seas"), as they were once believed by ancient astronomers to be filled with water. (Oh how so wrong)
The first lunar landing, landed on the Sea of tranquility but it did not splash.
See related link for a picture of the "seas".
Galileo had once thought that the maria on the moon were big oceans, but they turned out to be just dark areas on the moon where lava flows were once there. As for the origin, i don't understand the question at all.
The maria on the moon appear darker than the surrounding areas, which gave rise to the speculation that they were water.
The "seas" are now known to be made from lava that flowed out of volcanoes.
Maria. The dark patches on the moon were once thought to be seas and are called maria (Latin for `seas`). These are not actual seas containing water but are plains formed by ancient volcanic eruptions on the lunar surface. -RoryHem
The dark patches on the moon were once thought to be seas and are called maria (Latin for `seas`). These are not actual seas containing water but are plains formed by ancient volcanic eruptions on the lunar surface, lava.
The lunar maria are smooth and dark regions found on the moon' surface. Maria cover approximately 17 percent of the lunar surface area.
They are called lunar maria.
Lunar mare
Maria
maria.
Maria
Yes, "mare" is the Latin word for "sea". The lunar "seas" were so named by early astronomers because they though the lunar maria were seas like on Earth.
A "Maria", which is translated into "sea".
Maria. The dark patches on the moon were once thought to be seas and are called maria (Latin for `seas`). These are not actual seas containing water but are plains formed by ancient volcanic eruptions on the lunar surface. -RoryHem
They thought they were lunar "seas" like the oceans on earth. They are actually vast plains. But even today, they are still called "seas".Many early astronomers thought the dark spots on the moon were "seas". That is how all the lunar maria got their name, such as "Mare Tranquillitatis" which translates into "The Sea of Tranquility".
Mare is the Latin word that means sea; the plural is maria
The moon has many craters, and it does not have the atmosphere that the Earth has. There are lunar seas known as maria on the moon.
The dark patches on the moon were once thought to be seas and are called maria (Latin for `seas`). These are not actual seas containing water but are plains formed by ancient volcanic eruptions on the lunar surface.
The lunar maria (pronounced /ˈmɑri.ə/; singular: mare, two syllables /ˈmɑreɪ/[1]) are large, dark, basaltic plains on Earth's Moon, formed by ancient volcanic eruptions. They were dubbed maria, Latin for "seas", by early astronomers who mistook them for actual seas
The dark patches on the moon were once thought to be seas and are called maria (Latin for `seas`). These are not actual seas containing water but are plains formed by ancient volcanic eruptions on the lunar surface, lava.