More than 4.5 billion years ago, the surface of the Moon was a liquid magma ocean. Scientists think that one component of lunar rocks, KREEP (K-potassium, Rare Earth Elements, and P-phosphorus), represents the last chemical remnant of that magma ocean. KREEP is actually a composite of what scientists term "incompatible elements": those which cannot fit into a crystal structure and thus were left behind, floating to the surface of the magma. The lunar crust is composed of a variety of primary elements, including uranium, thorium, potas ...

See also:

Geology of the Moon, Geology of the Moon - Formation, Geology of the Moon - Lunar capture, Geology of the Moon - Fission hypothesis, Geology of the Moon - Accretion hypothesis, Geology of the Moon - Giant impact theory, Geology of the Moon - Geologic history, Geology of the Moon - Lunar landscape, Geology of the Moon - Lunar highlands and lowlands, Geology of the Moon - Impact cratering, Geology of the Moon - Highlands and craters, Geology of the Moon - Volcanism, Geology of the Moon - Maria, Geology of the Moon - Rilles, Geology of the Moon - Wrinkle-ridges, Geology of the Moon - Lunar domes, Geology of the Moon - Composition, Geology of the Moon - Surface, Geology of the Moon - Lunar surface, Geology of the Moon - Lunar rocks, Geology of the Moon - Highlands and lunar magma, Geology of the Moon - Mineral composition of lunar rocks, Geology of the Moon - Lunar minerals, Geology of the Moon - Study of lunar rocks, Geology of the Moon - Interior, Geology of the Moon - Interior and moonquakes

Read more here: » Geology of the Moon: Encyclopedia II - Geology of the Moon - Composition

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Moon Hee Jun, Moon Hee Jun - Discography, Moon Hee Jun - Fans Club, Moon Hee Jun - Albums, Moon Hee Jun - Singles, Moon Hee Jun - His Recent Compositions, Moon Hee Jun - Criticism

Read more here: » Moon Hee Jun: Encyclopedia II - Moon Hee Jun - His Recent Compositions

Moon - Composition. More than 4.5 billion years ago, the surface of the Moon was a liquid magma ocean. Scientists think that one component of lunar rocks, KREEP (K-potassium, Rare Earth Elements, and P-phosphorus), represents the last chemical remnant of that magma ocean. KREEP is actually a composite of what scientists term "incompatible elements": those which cannot fit into a crystal structure and thus were left behind, floating to the surface of the magma. For researchers, KREEP is a convenient tracer, useful ...

See also:

Moon, Moon - The two sides, Moon - Orbit, Moon - Earth & Moon, Moon - Origin and history, Moon - Physical characteristics, Moon - Composition, Moon - Selenography, Moon - Presence of water, Moon - Magnetic field, Moon - Atmosphere, Moon - Eclipses, Moon - Occultation of stars, Moon - Observation of the Moon, Moon - Exploration of the Moon, Moon - Human understanding of the Moon, Moon - Myth and folk culture, Moon - The Moon as muse, Moon - Astrology, Moon - Scientific understanding, Moon - Meteor impact on the Moon, Moon - Legal status, Moon - Satellites, Moon - Surface installations, Moon - Lunar location listings

Read more here: » Moon: Encyclopedia II - Moon - Physical characteristics

The Moon as seen from Earth Ammonia Carbon dioxide The Moon is the planet Earth's only natural satellite. It has no formal name other than "The Moon", although in English it is occasionally called Luna (Latin for moon), or Selene, to distinguish it from the generic "moon" (natural satellites of other planets are also called moons). Its symbol is a crescent (Unicode: ☾). The terms lunar, selene/seleno-, and cynthion (from the Lunar deities Selene and Cynthia) refer to the Moon (apo ...

Including:

• Moon - The two sides
• Moon - Orbit
• Moon - Earth & Moon
• Moon - Origin and history
• Moon - Physical characteristics
• Moon - Composition
• Moon - Selenography
• Moon - Presence of water
• Moon - Magnetic field
• Moon - Atmosphere
• Moon - Eclipses
• Moon - Occultation of stars
• Moon - Observation of the Moon
• Moon - Exploration of the Moon
• Moon - Human understanding of the Moon
• Moon - Myth and folk culture
• Moon - The Moon as muse
• Moon - Astrology
• Moon - Scientific understanding
• Moon - Meteor impact on the Moon
• Moon - Legal status
• Moon - Satellites
• Moon - Surface installations
• Moon - Lunar location listings

Read more here: » Moon: Encyclopedia - Moon

2003 EL61 (also written 2003 EL61), nicknamed "Santa" (non-official designation), is a very large and unusual Kuiper belt object recently discovered by Mike Brown et al. at Caltech in the United States. The nickname stems from its discovery just after Christmas, on December 28, 2004, although the Caltech team had acquired images of it starting May 6, 2004. The nickname is only temporary and will not be the official name of the object. IAU guidelines dictate that the object will be named after a c ...

Including:

• 2003 EL61 - Discovery controversy
• 2003 EL61 - Size and composition
• 2003 EL61 - Orbit
• 2003 EL61 - Moons
• 2003 EL61 - S/2005 2003 EL61 1
• 2003 EL61 - S/2005 2003 EL61 2

Read more here: » 2003 EL61: Encyclopedia - 2003 EL61

Jupiter is the fifth planet from the Sun and by far the largest within our solar system. Some have described the solar system as consisting of the Sun, Jupiter, and assorted debris,[2]; some describe Jupiter as the solar system's vacuum cleaner, due to its immense gravity well. It and the other gas giants - Saturn, Uranus, and Neptune, are sometimes referred to as "Jovian planets." The Romans named the planet after the Roman god Jupiter (also called Jove). The astronomical symbol for the planet is a styliz ...

Including:

• Jupiter - Overview
• Jupiter - Physical characteristics
• Jupiter - Planetary composition
• Jupiter - Atmosphere
• Jupiter - Planetary rings
• Jupiter - Magnetosphere
• Jupiter - Appearance
• Jupiter - Exploration of Jupiter
• Jupiter - Pioneer flyby missions
• Jupiter - Voyager flyby missions
• Jupiter - Ulysses flyby mission
• Jupiter - Galileo mission
• Jupiter - Cassini flyby mission
• Jupiter - Future probes
• Jupiter - Natural satellites
• Jupiter - Galilean moons
• Jupiter - Classification of Jupiter's moons
• Jupiter - Life on Jupiter
• Jupiter - Trojan asteroids
• Jupiter - Cometary impact
• Jupiter - Jupiter in fiction and film
• Jupiter - Jupiter and Internet conspiracists

Read more here: » Jupiter: Encyclopedia - Jupiter

The Cherokee black drink was a ceremonial drink consumed during purification and renewal ceremonies under the ancient Ah-ni-ku-ta-ni moon ceremonies traditionally performed by the Cherokee or Ah-ni-yv-wi-ya people. There were many theories on what the black drink was and its true composition. Contrary to popular belief, the Black drink was not a hallucinogen or a virulent poison, although it did contain large amounts of caffeine, and consuming too large an amount of the black drink could cause convulsions and death. It was well known for its em ...

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Click image for description Venus, the second planet from the Sun, is named after the Roman goddess Venus. A terrestrial planet, it is sometimes called Earth's "sister planet", as the two are very similar in size and bulk composition. Although all planets' orbits are elliptical, Venus's orbit is the closest to circular, with an eccentricity of less than 1%. As Venus is closer to the Sun than the Earth, it always appears in roughly the same direction from Earth as the Sun (the greatest e ...

Including:

• Venus - Physical characteristics
• Venus - Atmosphere
• Venus - Surface features
• Venus - Venus' moon
• Venus - Aspects
• Venus - Observations and explorations of Venus
• Venus - Lowest distances to earth
• Venus - Cultural references

Read more here: » Venus: Encyclopedia - Venus

William Allen Miller (December 17, 1817 – September 30, 1870) was a British chemist. Although he was a chemist, his major contribution was to astronomy, or more specifically spectroscopy, which was a very new field at the time. He won the Gold Medal of the Royal Astronomical Society in 1867 jointly with William Huggins, for their spectroscopic study of the composition of star ...

Read more here: » William Allen Miller: Encyclopedia - William Allen Miller

Ariel (air'-ee-ul, pronounced [ˈɛəɹiəl]) is a moon of Uranus discovered on 1851-10-24 by William Lassell. It was discovered at the same time as Umbriel. Ariel moon - Name. Ariel is named after the leading sylph in Alexander Pope's poem Rape of the Lock. The name "Ariel" and the names of all four satellites of Uranus then known were suggested by John Herschel in 1852 at the request of Lassell ([1]). Lassell had earlier endorsed H ...

Including:

• Ariel moon - Name
• Ariel moon - Physical characteristics

Read more here: » Ariel moon: Encyclopedia - Ariel moon

The giant impact hypothesis (or Big Splash or Big Whack; cf. Big Bang) is the now dominant scientific theory for the formation of the Moon, which is thought to have formed as a result of a collision between the young Earth and a Mars-sized body sometimes called Theia. The original hypothesis was first proposed in a paper published in Icarus in 1975 by Dr. William K. Hartmann and Dr. Donald R. Davis. 4.533 billion years (4.533 Ga) ago, shortly after the formation of the Earth, a Mars-sized planetesimal hit t ...

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Vesto Melvin Slipher (November 11, 1875 – November 8, 1969) was an American astronomer. His brother Earl C. Slipher was also an astronomer. Slipher was born in Mulberry, Indiana, and completed his education at Indiana University. He spent his entire career at Lowell Observatory in Flagstaff, Arizona, where he was director from 1916 to 1952. He used spectroscopy to investigate the rotation periods of planets, the composition of planetary atmospheres. In 1912 ff., he was the first to observe the shift of spectral lines of galaxies, so he was the discoverer of galactic redshifts. He died in Flagstaf ...

Including:

• Vesto Slipher - Awards and honors

Read more here: » Vesto Slipher: Encyclopedia - Vesto Slipher

243 Ida is a Main belt asteroid that was imaged by the Galileo probe on August 28, 1993. It was the first binary asteroid to be discovered. 243 Ida - Discovery and name. Ida was discovered by Johann Palisa on September 29, 1884 in Vienna. It is named after Ida, a Cretan nymph in Greek mythology who lived on a mountain that bore her name (see Mount Ida, Crete). 243 Ida - Moon. Ida has a small moon, Dactyl, which was discovered by Galileo mission member Ann Harch, wh ...

Including:

• 243 Ida - Discovery and name
• 243 Ida - Moon
• 243 Ida - Physical characteristics
• 243 Ida - Ida
• 243 Ida - Dactyl

Read more here: » 243 Ida: Encyclopedia - 243 Ida

87 Sylvia (sil'-vee-a) is one of the largest main belt asteroids. It orbits beyond most of the main belt asteroids, so it is classed as one of the Cybeles (see Minor planet groups). Sylvia is remarkable for being the first known asteroid to possess more than one moon. 87 Sylvia - Discovery and naming. Sylvia was discovered by N. R. Pogson on May 16, 1866 from Madras (Chennai), India. Paul Herget, in his The Names of the Minor Planets (1955), attributes the name as honouring the first wife of a ...

Including:

• 87 Sylvia - Discovery and naming
• 87 Sylvia - Physical characteristics
• 87 Sylvia - Moons

Read more here: » 87 Sylvia: Encyclopedia - 87 Sylvia

Hyperion moon - Shape. Hyperion is one of the largest highly irregular (non-spherical) bodies in the solar system (second to Proteus). A possible explanation for this is that Hyperion is a fragment of a larger body that was broken by a large impact in the distant past. The largest crater on Hyperion is approximately 120 km in diameter and 10 km deep. Hyperion moon - Composition. Like most of Saturn's moons, Hyperion's low density indicates that it is composed largely of water i ...

See also:

Hyperion moon, Hyperion moon - Name, Hyperion moon - Physical characteristics, Hyperion moon - Shape, Hyperion moon - Composition, Hyperion moon - Surface features, Hyperion moon - Rotation

Read more here: » Hyperion moon: Encyclopedia II - Hyperion moon - Physical characteristics

The Moon does not have tectonic plates, and as a result, its crust is not renewed constantly as Earth's surface is. Earthquakes on the Moon, called moonquakes, are minimal, and the largest (of magnitude 5, only occur about once a year. The interior of the Moon is very different from the interior of the Earth; the lunar crust only has a thickness of about 70 km in the side facing Earth, and of about 150 km on the side opposite. Maria have about 1 km of thickness (data derived from photogeologic studies). The samples returned to Earth and spac ...

See also:

Geology of the Moon, Geology of the Moon - Formation, Geology of the Moon - Lunar capture, Geology of the Moon - Fission hypothesis, Geology of the Moon - Accretion hypothesis, Geology of the Moon - Giant impact theory, Geology of the Moon - Geologic history, Geology of the Moon - Lunar landscape, Geology of the Moon - Lunar highlands and lowlands, Geology of the Moon - Impact cratering, Geology of the Moon - Highlands and craters, Geology of the Moon - Volcanism, Geology of the Moon - Maria, Geology of the Moon - Rilles, Geology of the Moon - Wrinkle-ridges, Geology of the Moon - Lunar domes, Geology of the Moon - Composition, Geology of the Moon - Surface, Geology of the Moon - Lunar surface, Geology of the Moon - Lunar rocks, Geology of the Moon - Highlands and lunar magma, Geology of the Moon - Mineral composition of lunar rocks, Geology of the Moon - Lunar minerals, Geology of the Moon - Study of lunar rocks, Geology of the Moon - Interior, Geology of the Moon - Interior and moonquakes

Read more here: » Geology of the Moon: Encyclopedia II - Geology of the Moon - Interior and moonquakes

Geology of the Moon - Highlands and lunar magma. The first rocks brought back by Apollo 11 were basalts. In spite that the mission landed on Mare Tranquillitatis (Latin for "Sea of Tranquility"), a few millimetric fragments of rocks coming from the highlands were picked up. These are composed mainly of plagioclase feldspar; some fragments were composed exclusively of plagioclase. These rocks are called anorthosites. The rocks of the highlands are made mainly of plagioclase since this mineral started ...

See also:

Geology of the Moon, Geology of the Moon - Formation, Geology of the Moon - Lunar capture, Geology of the Moon - Fission hypothesis, Geology of the Moon - Accretion hypothesis, Geology of the Moon - Giant impact theory, Geology of the Moon - Geologic history, Geology of the Moon - Lunar landscape, Geology of the Moon - Lunar highlands and lowlands, Geology of the Moon - Impact cratering, Geology of the Moon - Highlands and craters, Geology of the Moon - Volcanism, Geology of the Moon - Maria, Geology of the Moon - Rilles, Geology of the Moon - Wrinkle-ridges, Geology of the Moon - Lunar domes, Geology of the Moon - Composition, Geology of the Moon - Surface, Geology of the Moon - Lunar surface, Geology of the Moon - Lunar rocks, Geology of the Moon - Highlands and lunar magma, Geology of the Moon - Mineral composition of lunar rocks, Geology of the Moon - Lunar minerals, Geology of the Moon - Study of lunar rocks, Geology of the Moon - Interior, Geology of the Moon - Interior and moonquakes

Read more here: » Geology of the Moon: Encyclopedia II - Geology of the Moon - Lunar rocks

The moon is named after Hyperion, a Titan in Greek mythology. It is also designated Saturn VII. Hyperion's discovery came shortly after John Herschel had suggested names for the seven previously-known satellites of Saturn in his 1847 publication Results of Astronomical Observations made at the Cape of Good Hope ([5]). Lassell, who saw Hyperion two days after the Bonds, had already endorsed Herschel's naming scheme and suggested the name Hyperion in accordance with it. ...

See also:

Hyperion moon, Hyperion moon - Name, Hyperion moon - Physical characteristics, Hyperion moon - Shape, Hyperion moon - Composition, Hyperion moon - Surface features, Hyperion moon - Rotation

Read more here: » Hyperion moon: Encyclopedia II - Hyperion moon - Name

Moon Hee Jun - Fans Club. 2001-2004: H.I.T (SM ENTERTAINMENT) 2005: Junist (PS ENTERTAINMENT) Moon Hee Jun - Albums. 2001 Alone 2002 Messiah 2003 Legend 2004 The Best: Soaring for a Dream 2005 Triple X Moon Hee Jun - Singles. 2004 Winter Letter ...

See also:

Moon Hee Jun, Moon Hee Jun - Discography, Moon Hee Jun - Fans Club, Moon Hee Jun - Albums, Moon Hee Jun - Singles, Moon Hee Jun - His Recent Compositions, Moon Hee Jun - Criticism

Read more here: » Moon Hee Jun: Encyclopedia II - Moon Hee Jun - Discography

For a long time, the fundamental question regarding the history of the moon was of its origin. The hypotheses that have been created regarding it are as numerous as they are different from each other. The most important ones are: Geology of the Moon - Lunar capture. The moon was captured, completely formed, by the gravitational field of the Earth. This is unlikely, since a close encounter with the Earth would have produced either a collision or an alteration of the trajectory of the body in question, so if ...

See also:

Geology of the Moon, Geology of the Moon - Formation, Geology of the Moon - Lunar capture, Geology of the Moon - Fission hypothesis, Geology of the Moon - Accretion hypothesis, Geology of the Moon - Giant impact theory, Geology of the Moon - Geologic history, Geology of the Moon - Lunar landscape, Geology of the Moon - Lunar highlands and lowlands, Geology of the Moon - Impact cratering, Geology of the Moon - Highlands and craters, Geology of the Moon - Volcanism, Geology of the Moon - Maria, Geology of the Moon - Rilles, Geology of the Moon - Wrinkle-ridges, Geology of the Moon - Lunar domes, Geology of the Moon - Composition, Geology of the Moon - Surface, Geology of the Moon - Lunar surface, Geology of the Moon - Lunar rocks, Geology of the Moon - Highlands and lunar magma, Geology of the Moon - Mineral composition of lunar rocks, Geology of the Moon - Lunar minerals, Geology of the Moon - Study of lunar rocks, Geology of the Moon - Interior, Geology of the Moon - Interior and moonquakes

Read more here: » Geology of the Moon: Encyclopedia II - Geology of the Moon - Formation