
The Moon ( ) is Earth's only natural satellite and the fifth largest satellite in the Solar System. The average centre-to-centre distance from the Earth to the Moon is km, about thirty times the diameter of the Earth. The common centre of mass of the system (the barycentre) is located about km—a quarter the Earth's radius—beneath the surface of the Earth. The Moon makes a complete orbit around the Earth every 27.3 days (the orbital period), and the periodic variations in the geometry of the Earth–Moon–Sun system are responsible for the lunar phases that repeat every 29.5 days (the synodic period).
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The Moon Blog
Students to the Moon. Student Exploration No Comments " ... Potentia Tenebras Repellendi. Selenian Boondocks. Designed by The Moon Blog ...themoonblog.com/Fly Me To The Moon Trailer
Labels: Clip, Film, Fly Me To The Moon, IMAX, Movie, NASA, Preview, Preview Clip, ... who dream of adventure and wish to fly to the moon onboard of Apollo 11. ...fly-me-to-the-moon-trailer.blogspot.com/The Moon Society Blog
... Blogs ... you to easily track everything that is posted on the Moon Society Blog system. ... Since many of the larger moon worlds (like Ganymede, Callisto ...www.moonsociety.org/blog/index.phpContemplating the Moon
Thank you for all the wonderful comments left on the blog. ... Contemplating the Moon. Topics: art, encaustic, paintings. Join my network. Blog Networks ...www.bgmartjournal.blogspot.com/Musings from the Moon
Musings from the Moon. Home. Who is Bohemian Moon and Why Do We Care? Jon and Kate Plus 8 ... Musings from the Moon Comment of the Week. Octomom - Nadya ...blog.psychic-wisdom.net/
The Moon ( ) is Earth's only natural satellite and the fifth largest satellite in the Solar System. The average centre-to-centre distance from the Earth to the Moon is km, about thirty times the diameter of the Earth. The common centre of mass of the system (the barycentre) is located about km—a quarter the Earth's radius—beneath the surface of the Earth. The Moon makes a complete orbit around the Earth every 27.3 days (the orbital period), and the periodic variations in the geometry of the Earth–Moon–Sun system are responsible for the lunar phases that repeat every 29.5 days (the synodic period).
The Moon is the only celestial body to which humans have traveled and upon which humans have performed a manned landing. The first artificial object to pass near the Moon was the Soviet Union's Luna 1, the first artificial object to impact the lunar surface was Luna 2, and the first photographs of the normally occluded far side of the Moon were made by Luna 3, all in 1959. The first spacecraft to perform a successful lunar soft landing was Luna 9, and the first unmanned vehicle to orbit the Moon was Luna 10, both in 1966. The United States (U.S.) Apollo program achieved the only manned missions to date, resulting in six landings between 1969 and 1972. Human exploration of the Moon ceased with the conclusion of the Apollo program, although a few robotic landers and orbiters have been sent to the Moon since that time. Several countries have announced plans to return humans to the surface of the Moon in the 2020s.
Name and etymology
The proper English name for Earth's natural satellite is, simply, the Moon (capitalized). Moon is a Germanic word, related to the Latin lang: mensis (month). It is ultimately a derivative of the Proto-Indo-European root me-, also represented in measure (time), with reminders of its importance in measuring time in words derived from it like Monday , month and menstrual. The related adjective is lunar, as well as an adjectival prefix seleno- and suffix -selene (from selēnē, the Ancient Greek word for the Moon). In English, the word moon exclusively meant "the Moon" until 1665, when it was extended to refer to the recently discovered natural satellites of other planets. Subsequently, these objects were given distinct names in order to avoid confusion. The Moon is occasionally referred to by its Latin name lang: Luna, primarily in science fiction.
Lunar surface
main: Geology of the Moon
Two sides of the Moon
The Moon is in synchronous rotation, which means it rotates about its axis in about the same time it takes to orbit the Earth. This results in it keeping nearly the same face turned towards the Earth at all times. The Moon used to rotate at a faster rate, but early in its history, its rotation slowed and became locked in this orientation as a result of frictional effects associated with tidal deformations caused by the Earth.

























