Moon

lunarthe MoonLunaEarth's Moonlunar surfacemoon's origin and evolutionMoons1as EarthChandralok
The Moon is an astronomical body that orbits planet Earth and is Earth's only permanent natural satellite.wikipedia
6,172 Related Articles

Earth

terrestrialworldGlobal
The Moon is an astronomical body that orbits planet Earth and is Earth's only permanent natural satellite.
Earth's gravity interacts with other objects in space, especially the Sun and the Moon, Earth's only natural satellite.

Mars

Martianplanet MarsRed Planet
The most widely accepted explanation is that the Moon formed from the debris left over after a giant impact between Earth and a Mars-sized body called Theia.
Mars is a terrestrial planet with a thin atmosphere, having surface features reminiscent both of the impact craters of the Moon and the valleys, deserts, and polar ice caps of Earth.

Age of the Earth

formation of the EarthEarthage of Earth
The Moon is thought to have formed about 4.51 billion years ago, not long after Earth.
This dating is based on evidence from radiometric age-dating of meteorite material and is consistent with the radiometric ages of the oldest-known terrestrial and lunar samples.

Jupiter

Jovianplanet JupiterGiove
The Moon is after Jupiter's satellite Io the second-densest satellite in the Solar System among those whose densities are known.
When viewed from Earth, Jupiter can reach an apparent magnitude of −2.94, bright enough for its reflected light to cast shadows, and making it on average the third-brightest natural object in the night sky after the Moon and Venus.

Natural satellite

moonmoonssatellite
The Moon is an astronomical body that orbits planet Earth and is Earth's only permanent natural satellite.
The first known natural satellite was the Moon, but it was considered a "planet" until Copernicus' introduction of De revolutionibus orbium coelestium in 1543.

Tidal acceleration

tidal frictiontidal decelerationtidal effects
Its gravitational influence produces the ocean tides, body tides, and the slight lengthening of the day.
Tidal acceleration is an effect of the tidal forces between an orbiting natural satellite (e.g. the Moon), and the primary planet that it orbits (e.g. Earth).

List of Solar System objects by size

largestequatorial radiusfifteenth-largest object
It is the fifth-largest natural satellite in the Solar System, and the largest among planetary satellites relative to the size of the planet that it orbits (its primary).

Impact crater

cratercratersimpact basin
The near side is marked by dark volcanic maria that fill the spaces between the bright ancient crustal highlands and the prominent impact craters.
Impact craters are the dominant geographic features on many solid Solar System objects including the Moon, Mercury, Callisto, Ganymede and most small moons and asteroids.

Apollo program

ApolloApollo missionsApollo space program
The United States' NASA Apollo program achieved the only manned lunar missions to date, beginning with the first manned orbital mission by Apollo 8 in 1968, and six manned landings between 1969 and 1972, with the first being Apollo 11.
The Apollo program, also known as Project Apollo, was the third United States human spaceflight program carried out by the National Aeronautics and Space Administration (NASA), which succeeded in landing the first humans on the Moon from 1969 to 1972.

Apollo 11

1969 moon landingmoon landingApollo 11 moon landing
The United States' NASA Apollo program achieved the only manned lunar missions to date, beginning with the first manned orbital mission by Apollo 8 in 1968, and six manned landings between 1969 and 1972, with the first being Apollo 11.
Apollo 11 was the spaceflight that landed the first two people on the Moon.

Moon rock

lunar rocklunar samplelunar samples
These missions returned lunar rocks which have been used to develop a geological understanding of the Moon's origin, internal structure, and the Moon's later history.
Moon rock or lunar rock is rock that is found on the Earth's moon including lunar material collected during the course of human exploration of the Moon, or rock that has been ejected naturally from the Moon's surface (and which has then landed on the Earth as meteorites).

Lunar mare

marelunar mariamaria
The near side is marked by dark volcanic maria that fill the spaces between the bright ancient crustal highlands and the prominent impact craters.
The lunar maria (singular: mare ) are large, dark, basaltic plains on Earth's Moon, formed by ancient volcanic eruptions.

Apollo 8

8Apollo 8 missionDebrief: Apollo 8
The United States' NASA Apollo program achieved the only manned lunar missions to date, beginning with the first manned orbital mission by Apollo 8 in 1968, and six manned landings between 1969 and 1972, with the first being Apollo 11.
Apollo 8, the second manned spaceflight mission flown in the United States Apollo space program, was launched on December 21, 1968, and became the first manned spacecraft to leave low Earth orbit, reach the Moon, orbit it, and return.

Lunar distance (astronomy)

lunar distancesLDlunar distance
The Moon's average orbital distance is, or 1.28 light-seconds.
It is the average distance from the center of Earth to the center of the Moon.

Geology of the Moon

lunar surfacelunar highlandshighlands
These missions returned lunar rocks which have been used to develop a geological understanding of the Moon's origin, internal structure, and the Moon's later history.
The Moon lacks a significant atmosphere, which eliminates erosion due to weather; it does not have any form of plate tectonics, it has a lower gravity, and because of its small size, it cooled more rapidly.

Night sky

night skiessky''' of the Earthsky of Earth
Its surface is actually dark, although compared to the night sky it appears very bright, with a reflectance just slightly higher than that of worn asphalt.
The term night sky, usually associated with astronomy from Earth, refers to the nighttime appearance of celestial objects like stars, planets, and the Moon, which are visible in a clear sky between sunset and sunrise, when the Sun is below the horizon.

Moon in fiction

MoonSomniumthe Moon
Such cultural influences can be found in language, lunar calendar systems, art, and mythology.
The Moon has been the subject of many works of art and literature and the inspiration for countless others.

Luna 2

Lunikfirst man-made object hitting the Moon's surfacethe Russians did that in 1959
The Moon was first reached in September 1959 by the Soviet Union's Luna 2, an unmanned spacecraft.
Luna 2 (E-1A series) or Lunik 2 was the second of the Soviet Union's Luna programme spacecraft launched to the Moon.

Near side of the Moon

near sidelunar near sideMoon's near side
The Moon is in synchronous rotation with Earth, and thus always shows the same side to Earth, the near side.
Only one side of the Moon is visible from Earth because the Moon rotates on its axis at the same rate that the Moon orbits the Earth – a situation known as synchronous rotation, or tidal locking.

Solar System

outer Solar Systeminner Solar SystemSol system
It is the fifth-largest natural satellite in the Solar System, and the largest among planetary satellites relative to the size of the planet that it orbits (its primary).
Six of the planets, at least four of the dwarf planets, and many of the smaller bodies are orbited by natural satellites, usually termed "moons" after the Moon.

Earth tide

earth tidesbody tidescrustal tides
Its gravitational influence produces the ocean tides, body tides, and the slight lengthening of the day.
Earth tide (also known as solid Earth tide, crustal tide, body tide, bodily tide or land tide) is the displacement of the solid earth's surface caused by the gravity of the Moon and Sun.

Selenography

selenographerlunar scienceSelenographic
It is derived from the Ancient Greek word for the Moon, σελήνη (selḗnē), from which is however also derived the prefix "seleno-", as in selenography, the study of the physical features of the Moon, as well as the element name selenium.
Selenography is the study of the surface and physical features of the Moon.

Lunar calendar

lunarlunar yearlunar month
Such cultural influences can be found in language, lunar calendar systems, art, and mythology.
A lunar calendar is a calendar based upon the monthly cycles of the Moon's phases (synodic months), in contrast to solar calendars, whose annual cycles are based only directly upon the solar year.

Origin of the Moon

formation of the Moongiant impact hypothesismoon was created
These missions returned lunar rocks which have been used to develop a geological understanding of the Moon's origin, internal structure, and the Moon's later history.
The origin of the Moon is usually explained by a Mars-sized body striking the Earth, making a debris ring that eventually collected into a single natural satellite, the Moon, but there are a number of variations on this giant-impact hypothesis, as well as alternate explanations, and research into how the Moon came to be continues.

Diana (mythology)

DianaTriviaDiane
Both the Greek goddess Selene and the Roman goddess Diana were alternatively called Cynthia.
Diana (Classical Latin: ) is a Roman goddess of the hunt, the moon, and nature, associated with wild animals and woodland.