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=== [[/Europa|Europa]] ===
Europa tiene un diámetro de 3.121,6 km y es 10% más pequeña que nuestra Luna. Está formada por silicatos y tiene una capa hielo de entre 10 a 30 km de espesor. Esta capa de hielo tiene grandes rajaduras y muy pocos cráteres. Desde la Tierra se ve como una mar de hielo. Existe agua líquida debado de la capa de hielo hasta 100 km bajo la superficie. Existen también grandes manchas en la superficie. En la mitología romana, Europa fue cortejada por Júpiter en la forma de un toro.
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The ice had slid around at the cracks. There is liquid water under the ice up to 100 km below the surface. There are also some large spots on the surface. In Roman mythology Europa was courted by Jupiter in the form of a bull.
[[Image:PIA04866 modest.jpg|thumb|200px|left|Jupiter as seen by the space probe "Cassini". This is the most detailed color portrait of Jupiter ever assembled.]]
 
 
=== [[/Ganymede|Ganymede]] ===
[[Image:PIA04866 modest.jpg|thumb|200px|left|JupiterJúpiter asvisto seendesde byla the space probesonda "Cassini". ThisEsta ises thela mostimagen detaileda color portrait ofmás Jupiterdetallada everde assembledJúpiter.]]
 
=== [[/GanymedeGanímedes|GanymedeGanímedes]] ===
Ganymede is 5262.4 km across, making it 380 km wider than Mercury. It is Jupiter's largest moon and the largest moon in the Solar System. It had '''plate tectonics''' like Earth. There are older darker regions and newer areas with grooves where the plates moved. Newer craters have bright rays around them from material thrown up by impacts. Older craters look flat and faded because the icy surface does not hold the shape of the crater as well as rock does over long periods of time. Ganymede may have an iron and sulfur core with a silicate '''mantle''' and an icy shell. It may be like Io except with a layer of ice on it. In Roman mythology Ganymede was a beautiful young man who Jupiter kidnapped and made cupbearer to the gods on Mt. Olympus.
 
=== [[/CallistoCalisto|CallistoCalisto]] ===
 
Callisto is 4820.6 km across, about the same size as Mercury. It has many craters. Like craters on Ganymede, the older craters had faded. The largest crater is ''Valhalla''. It has a bright center 600 km across with rings around it up to 3000 km across. Callisto is made of silicates and ice. There is a 200 km thick icy '''crust''' with a liquid water sea under it. In Roman mythology Callisto was turned into a bear by Jupiter's jealous wife Juno. Later Jupiter placed her in the stars as The Great Bear.
 
=== OtherOtras moonslunas ===
 
The other moons are tiny ones in several groups outside the orbits of the major moons, there is a small moon, Themisto and four groups of little moons that orbit very far from Jupiter.
 
== How¿Cuánto longdura isun adía dayen oneste this planetplaneta? ==
El día en Júpiter dura aproximadamente 10 horas terrestres. Es necesario decir aproximadamente porque Júpiter rota a diferentes velocidades dependiendo su centro. Esto es causado por el hecho que la mayor parte de los gases en Júpiter está en constante movimiento y alguna veces van en sentidos contrarios. Se han hecho algunos esfuerzos para determinar la velocidad de rotación del núcleo rocos de Júpiter, pero debido a los campos magnéticos de Júpiter y la cantidad de ondas de radio emitidas por su atmósfera esto no ha sido posible.
One Jupiter day is about 10 Earth hours long. You have to say "about" because different parts of Jupiter rotate about its axis at different speeds. This is caused by the fact that Jupiter is mostly gases that are in constant motion and sometimes going in opposite directions. Some efforts have been made to try and measure the rotation speed of the inner rocky core of Jupiter, but that has proved to be quite difficult to accomplish due to the magnetic fields that surround Jupiter and the very active radio energy that is generated by the atmosphere of Jupiter, which interferes with measuring techniques like radar that has been used to measure the surface of Venus and Mars.
 
== How¿Cuánto longdura isun aaño yearen oneste this planetplaneta? ==
[[Image:Great Red Spot From Voyager 1.jpg|thumb|200px|left|TheLa Greatgran Redmancha Spotroja]]
[[Image:Hubble Spies Jupiter Eclipses.jpg|thumb|200px|right|Jupiter Eclipses en Júpiter]]
Un año en Júpiter equivale a 4.335 días en la tierra, lo que sería 11,87 años.
One year on Jupiter is 4,335 Earth days or 11.87 Earth years long.
 
Un año de Júpiter es igual a los cuatro décimos (o dos quintos) de un año de Saturno. Lo que significa que cada dos años de Saturno, Júpiter ha completado cinco órbitas completas alrededor del Sol. Eso significa que después de 59 años, Saturno y Júpiter estarán en la misma posición. Cuando las órbitas de dos planetas son
A Jupiter year is about equal to four-tenths (or two-fifths) of a Saturn year. Thus after every two Saturn years, Jupiter has completed five full orbits about the Sun. So after 59 years, Saturn and Jupiter will be back in nearly the same position. When the orbits of two planets are simple ratios of each other like this, it is called a '''resonance'''.<br clear=all>
 
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== Who is it named after? ==
[[Image:Statue_of_Zeus.jpg|thumb|left|125px|StatueEstatua ofde ZeusZéus (JupiterJúpiter) inen OlympiaOlimpia, GreeceGrecia]]
 
Jupiter is named after the chief of the Roman gods, also called Zeus in ancient Greece. It was so named because of the planet's enormous size, which dominates all the others.
 
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