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Topic: Themisto (moon)


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In the News (Tue 17 Nov 09)

  
  Wikipedia search result
Moons orbiting relatively close to the planet on prograde orbits (regular satellites) are generally believed to have been formed out of the same collapsing region of the protoplanetary disk that gave rise to its primary.
Most regular moons in the solar system are tidally locked to their primaries, meaning that one side of the moon is always turned toward the planet.
In addition to the moons of the various planets there are also over 80 known moons of the dwarf planets, asteroids and other small solar system bodies.
feedbus.com /wikis/wikipedia.php?title=Natural_satellite   (1626 words)

  
 Space Today Online - Exploring Jupiter System - Jupiter's many moons
The numerous small outer moons — which may be asteroids captured by the giant planet's gravity — hardly resemble the Galilean satellites.
The moons travel in clusters and may well be pieces of larger objects that shattered in collisions with passing comets.
Amalthea was the last moon to be discovered by direct visual observation — as opposed to photography — when it was spotted in 1892 by Edward Emerson Barnard using the 36 inch telescope at Lick Observatory on Mount Hamilton in California.
www.spacetoday.org /SolSys/Jupiter/JupiterMoons.html   (2570 words)

  
 Space Today Online - Moons of the Solar System
The Moon is one of the larger natural satellites with a diameter of 2,160 miles.
The moons are 120,000 miles and 131,000 miles from the center of planet Saturn between the moons Mimas and Enceladus.
The smallest moon is Deimos, at Mars, only seven miles in diameter, although its size now is rivaled by the small shepherd moons discovered by Cassini at Saturn and by others yet to be counted and named in the rings around Jupiter, Saturn and other giant gas planets in the outer Solar System.
www.spacetoday.org /SolSys/Moons/MoonsSolSys.html   (1335 words)

  
 NASA's Solar System Exploration: Planets: Jupiter: Moons   (Site not responding. Last check: 2007-10-20)
Io, innermost of the Galilean satellites and slightly larger that Earth's moon, goes through even greater gravitational flexing, with "tides" of as much as 100 meters (328 feet) in its solid rock surface.
Ganymede is the biggest moon in the solar system and, in fact, is larger than the planets Mercury and Pluto.
Callisto, about the size of Mercury, is the third largest moon in the solar system (Saturn's Titan is #2) and is the outermost of the Galilean satellites.
www.ulo.ucl.ac.uk /~diploma/year_one/NASA_SSE/jupiter_moons.html   (608 words)

  
 The Moons of the Solar System — Themisto
The moon of Jupiter –; Themisto (XVIII) – was previously temporarily designated as: S/1975 J1 = S/2000 J1.
    Themisto is one of eleven new satellites discovered since the →Voyager-2 Jupiter system fly-by which occured 21 years ago (1979).
Themisto was wife of Athamas, the King of Thebes, who attempted to kill his own children but became disoriented and killed his wife in stead.
ksiezyce.republika.pl /jupiter/themisto_en.html   (567 words)

  
 The Stars and Scopes Glossary: API Developer Reference Page
A moon of Uranus was discovered by Brett J. Gladman, Philip D. Nicholson, Joseph A. Burns, and John J. Kavelaars using the 200-inch Hale telescope on September 6, 1997.
The shape of the lit portion of the moon or a planetary disk where the lit portion of the disk is less than half the disk surface.
The week between the Full Moon and the Last Quarter Moon the sunlit side of the Moon is called waning (shrinking) gibbous and is shrinking until the lunar disk is half in sunlight and half in shadow.
starsandscopes.net /reference.php   (9925 words)

  
 Jupiter from Themisto   (Site not responding. Last check: 2007-10-20)
At a distance of 4.7 million miles, Jupiter subtends an angle of 1.1 degrees (the moon subtends an angle of 0.5 degrees in Earth's sky).
Beyond Themisto are another 54 known jovian satellites, the furthest of which has an orbital radius of 19 million miles.
With a mean diameter of only 5 miles and an albedo (surface brightness) about half that of the moon, no earthbound telescope or interplanetary probe has yet revealed any details of Themisto's surface.
www.arcadiastreet.com /cgvistas/jupiter_140.htm   (201 words)

  
 Reference.com/Encyclopedia/Themisto (moon)
Themisto (thə-mis'-toe, θəˈmɪstoʊ; Greek Θεμιστώ), or Jupiter XVIII, is a prograde irregular satellite of Jupiter.
It was first discovered by Charles T. Kowal and Elizabeth Roemer on September 30, 1975, reported on October 3 (IAUC 2845) and designated S/1975 J 1, but not enough observations were made to establish an orbit and it was subsequently lost, rendering it hypothetical.
Themisto is about 8 kilometers in diameter (assuming an albedo of 0.04)
www.reference.com /browse/wiki/Themisto_(moon)   (255 words)

  
 Themisto
The ninth moon of Jupiter; a small, irregular moon that orbits inside, and does not belong to, the two main dynamical clusters of jovian irregular moons.
Its discovery was announced in 2000 by Scott Sheppard, David Jewitt, Yan Fernandez, and Eugene Magnier.
Themisto has a prograde (direct) orbit with an orbital radius of approximately 100 Jupiter radii.
www.daviddarling.info /encyclopedia/T/Themisto.html   (143 words)

  
 Changing One's Stars
The inside of the tiny moon is fissured with caves and passages, with the walls of this maze carved in sqared spirals and wave patterns.
Her moon is another unremarkable chunk of rock, although in the spirit world the stone faces and pillars have been carved to resemble Roman architecture.
She is now a spirit of the moon Themisto, as the humans call it, tied inextricably to the rock.
cursed-unicorn.livejournal.com   (11940 words)

  
 Jupiter's Moons   (Site not responding. Last check: 2007-10-20)
Callisto, the outermost of the Galilean moons, is almost an exact twin of Mercury in size and appearance.
The outer 33 moons all orbit Jupiter in a direction opposite (except for J/2003 J20) to that which Jupiter spins, which leads scientists to believe they are captured asteroids.
Nearly all of the moons that have been discovered in the last few years orbit retrograde to the direction of Jupiter's rotation, indicating that they are most likely not native to the system.
filer.case.edu /~sjr16/jupiter_moons.html   (550 words)

  
 Terraformers Society of Canada - Moons of Jupiter
The four large moons, known as the "Galilean moons", are Io, Europa, Ganymede and Callisto.
This constant tug of war causes regular flexing of the three moons' shapes, Jupiter's gravity stretches the moons more strongly during the portion of their orbits that are closest to it and allowing them to spring back to more spherical shapes when they're farther away.
A basic division is between the eight inner regular moons with nearly circular orbits near the plane of Jupiter's equator, which are believed to have formed with Jupiter, and an unknown number of small irregular moons, with elliptical and inclined orbits, which are believed to be captured asteroids or fragments of captured asteroids.
society.terraformers.ca /content/view/55/103   (296 words)

  
 On This and Other Moons
If the sizes of the moons are expressed relative to their primary (the planet they orbit) there are still more surprises.
Being close to Jupiter (it is the innermost of the Galilean moons) the planet's massive gravity stretches the moon by some 100m and locks its rotation so the same side always faces the planet.
But nearby moons Europa and Ganymede peturb it when they pass, making the tidal bulges shift and heating the Io's interior with the friction of the flexing.
www.inconstantmoon.com /cyc_moon.htm   (1127 words)

  
 Themisto
In Greek mythology, Themisto (the-mis'-toe, Greek Θεμιστώ) was the third and last wife of Athamas.
When Athamas returned to his second wife, Ino, Themisto dressed all her own children in white clothing, and Ino's in fl.
Themisto then proceeded to kill all the fl-clothed children, as an act of revenge against Athamas.
www.mlahanas.de /Greeks/Mythology/Themisto.html   (190 words)

  
 Inconstant Moon News
Two of the moons, Puck and Portia, are so small that they were only discovered by the flyby of the Voyager 2 space probe in 1985-6.
The high tides will occur because the combined gravitational pull of the Sun and the Moon, which is at its most effective at the time of the new or full moon when they align with the Earth, is further enhanced by a close approach of the Moon to the Earth.
In an attempt to reconcile the generally accepted evidence that the Moon has a small metallic core with the seismic indications that its core has a density too low for a primarily iron composition, Mark Wieczorek and Maria Zuber of MIT suggest that a core of molten titanium-rich silicates could provide a solution.
www.inconstantmoon.com /news02.htm   (1546 words)

  
 Jupiter's new moons get mythical monickers
As Zeus had a long list of amorous conquests, it was quite easy to baptise new moons as they were gradually identified over the centuries.
Among the 11 are Harpalyke, a hunter-warrior goddess of the night who had a stable of sacred mares that she could outrun; Themisto, who murdered her own children in the mistaken belief that they were the offspring of a rival in love; and Taygete, one of the seven Pleiades.
The Pleiades were virgins who, according to rival myths, were changed by Zeus into doves, and then stars, to prevent them being ravished by the hunter Orion or alternatively committed suicide after their death of their sisters, the Hyades.
www.spacedaily.com /2002/021205201933.zfnz90bc.html   (366 words)

  
 A Hotlist on Jupiter's Moons   (Site not responding. Last check: 2007-10-20)
The Galilean moons consist of the 4 moons discovered by Galileo Galilei which are some of the largest moons in the solar system.
There are also two moons, Themisto and Carpo are in groups of their own because of their odd locations.
It includes the facts, the resonance causes the gravitational effects of the three moons to distort their orbits into elliptical shapes and that the inner group of four small moons all have diameters of less than 200 km.
www.kn.sbc.com /wired/fil/pages/listjupiterbr.html   (2595 words)

  
 jupiter's moons
In this lab we'll talk about the various moon systems and discuss explanations of why they are the way they are, and also what their properties suggest about the formation of the Solar System.
It has a lot of small moons orbiting close to the planet, some midsized ones orbiting farther away, and in the midst of these, a single large moon, Titan, that is the only moon with a substantial atmosphere.
As with almost all moons, the moons of Uranus orbit in planes that are very nearly parallel to the planet's equatorial plane.
www.gpc.edu /~fbuls/weblabs/moons/moons11.htm   (2876 words)

  
 The Names of the Moons and Their Meanings
Themisto Not a very pleasant lady; she tried to kill her husband's first wife's children by dressing her own children in white and the victims in fl so they could be distinguished in the dark, but the first wife switched the clothes and Themisto ended up killing her own children by mistake.
Mundilfari A Norse Giant who angered the gods by naming his beautiful children Mani (moon) and Sol (sun); the children were then forced to guide the chariots of their namesakes.
All of Uranus's moons are named for Shakespeare characters, which is too bad, because there were plenty of Titans and monsters associated with him that could have been used.
www.fief.org /kathleen/Moons/Moons.html   (2514 words)

  
 Astrology of Unconventional Planets
Jupiter's Moons -- As of 2005 Jupiter was known to have 63 satellites.
The type of orbits of the outer moons suggests that they were once asteroids or fragments of larger bodies smashed by asteroids or comets.
JULIET, Moon of Uranus -- The name "Juliet" is a feminine form of "Helios", remeniscent of Romeo's saying "It is the East, and Juliet is the Sun".
erikthevermilion.com /unconventional.planets.htm   (1856 words)

  
 Chapter 13: Jupiter
Another half-dozen moons were announced to be orbiting Jupiter by a team at the University of Hawaii including Scott Sheppard and David Jewitt and Cambridge's Jan Kleyna.
Jupiter has 58 moons as of this writing, but Jewitt estimates that perhaps 100 can be found with the current method of wide-field mosaic CCD's with today's telescopes and cameras.
Callisto's surface of ice and rock is the most heavily cratered of any moon in the solar system, signifying that it is geologically "dead." There is no clear evidence that Callisto has experienced the volcanic activity or tectonic shifting that have erased some or all of the impact craters on Jupiter's other three large moons.
www.williams.edu /Astronomy/jay/chapter13_etu6.html   (4890 words)

  
 The Moons of the Solar System — Harpalyke   (Site not responding. Last check: 2007-10-20)
The moon of Jupiter –; Harpalyke (XXII) – was previously temporarily designated as S/2000 J5.
With this moon, the team discovered also: Themisto, Kalyke, Iocaste, Erinome, Isonoe, Praxidike, Megaclite, Taygete, Chaldene and S/2000 J11.
    The moon by this name is in elliptical retrograde orbit (→eccentricity e = 0.227) with a →semimajor axis a = 21,132,000 km.
republika.pl /ksiezyce/jupiter/harpalyke_en.html   (410 words)

  
 The Amazon Nation - by C.A. Osborne   (Site not responding. Last check: 2007-10-20)
The first measure of time, of waxing and waning, was the Moon, and the same concept of growth followed by waning lead to the concept of Karma.
As Moon and Karmic Goddess she carried a wheel in one hand and an apple branch in the other, she wore a silver crown decorated with stags.
The Muses, 'Mountain Goddesses' are the ninefold Moon and Swan Goddess, served by colleges of nine priestesses who kept plots of land in the mountains of Northern Greece and Southern Thrake, as well as on the island of Lesbos.
www.amazonworlds.com /index/osborne11.htm   (2693 words)

  
 Moons of the Solar System - Explore the Cosmos | The Planetary Society
A whirlwind of "new moon" discoveries have kept teachers, textbooks, and web sites scrambling to keep up.
In an effort to set the record straight, listed below are the number of known moons in our solar system as of July 2006.
Follow the links below to find out more about the moons in the solar system that have been given names, or visit our news archives to find out the details of the discoveries of the new moons.
www.planetary.org /explore/topics/compare_the_planets/moon_numbers.html   (224 words)

  
 Themisto — FactMonster.com
Themisto, in astronomy, one of the 39 known moons, or natural satellites, of
Many Moons - Many Moons Earth's Moon is a small ball of gray rock revolving 239,000 miles around Earth.
Jupiter, in astronomy: Its Moons and Rings - Its Moons and Rings At least 63 natural satellites orbit Jupiter.
www.factmonster.com /ce6/sci/A0909808.html   (101 words)

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