The usual English proper name for Earth’s natural satellite is “the Moon”, which in nonscientific texts is usually not capitalized. The noun moon is derived from Old English mōna, which (like all Germanic language cognates) stems from Proto-Germanic *mēnô, which comes from Proto-Indo-European *mḗh₁n̥s “moon”, “month”, which comes from the Proto-Indo-European root *meh₁- “to measure”, the month being the ancient unit of time measured by the Moon. Occasionally, the name “Luna” is used. In literature, especially science fiction, “Luna” is used to distinguish it from other moons, while in poetry, the name has been used to denote personification of Earth’s moon.
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The GRAIL mission determined the internal structure of the Moon in great detail for nine months during 2012. Armed with this the new information, GRAIL astronomers were able to redefine the sizes of the largest impact basins on the lunar surface. Dr. Carolyn Porco, a planetary scientist and leader of the Imaging Science team for Cassini, explained to the press in March 2012 that "More than 90 jets of all sizes near Enceladus's south pole are spraying water vapor, icy particles, and organic compounds all over the place. Cassini has flown several times now through this spray and has tasted it. And we have found that aside from water and organic material, there is salt in the icy particles. The salinity is the same as that of Earth's oceans." What is the difference between a Lunar Eclipse and New Moon? They seem quite similar and there is often confusion between the two. A lunar eclipse happens twice a year whereas a new moon happens once a month. Here is further clarification: