What is Jupiter?s most well-known feature?
366037
Its big red dot, its a storm.
209591
From our small world we have gazed upon the cosmic ocean for thousands of years. Ancient astronomers observed points of light that appeared to move among the stars. They called these objects planets, meaning wanderers, and named them after Roman deities - Jupiter, king of the gods; Mars, the god of war; Mercury, messenger of the gods; Venus, the god of love and beauty, and Saturn, father of Jupiter and god of agriculture. The stargazers also observed comets with sparkling tails, and meteors or shooting stars apparently falling from the sky.\n\nSince the invention of the telescope, three more planets have been discovered in our solar system: Uranus (1781), Neptune (1846), and Pluto (1930). In addition, there are thousands of small bodies such as asteroids and comets. Most of the asteroids orbit in a region between the orbits of Mars and Jupiter, while the home of comets lies far beyond the orbit of Pluto, in the Oort Cloud.\n\nThe four planets closest to the Sun - Mercury, Venus, Earth, and Mars - are called the terrestrial planets because they have solid rocky surfaces. The four large planets beyond the orbit of Mars - Jupiter, Saturn, Uranus, and Neptune - are called gas giants. Tiny, distant, Pluto has a solid but icier surface than the terrestrial planets.\n\nNearly every planet - and some of the moons - has an atmosphere. Earth's atmosphere is primarily nitrogen and oxygen. Venus has a thick atmosphere of carbon dioxide, with traces of poisonous gases such as sulfur dioxide. Mars' carbon dioxide atmosphere is extremely thin. Jupiter, Saturn, Uranus, and Neptune are primarily hydrogen and helium. When Pluto is near the Sun, it has a thin atmosphere, but when Pluto travels to the outer regions of its orbit, the atmosphere freezes and collapses to the planet's surface. In that way, Pluto acts like a comet.\n\nThere are 154 known natural satellites (also called moons) in orbit around the various planets in our solar system, ranging from bodies larger than our own Moon to small pieces of debris. Many of these were discovered by planetary spacecraft. Some of these have moons have atmospheres (Saturn's Titan); some even have magnetic fields (Jupiter's Ganymede). Jupiter's moon Io is the most volcanically active body in the solar system. An ocean may lie beneath the frozen crust of Jupiter's moon Europa, while images of Jupiter's moon Ganymede show historical motion of icy crustal plates. Some planetary moons may actually be asteroids that were captured by a planet's gravity. The captured asteroids presently counted as moons may include Phobos and Deimos, several satellites of Jupiter, Saturn's Phoebe, many of Uranus' new satellites, and possibly Neptune's Nereid.\n\nFrom 1610 to 1977, Saturn was thought to be the only planet with rings. We now know that Jupiter, Uranus, and Neptune also have ring systems, although Saturn's is by far the largest. Particles in these ring systems range in size from dust to boulders to house sized, and may be rocky and/or icy.\n\nMost of the planets also have magnetic fields which extend into space and form a magnetosphere around each planet. These magnetospheres rotate with the planet, sweeping charged particles with them. The Sun has a magnetic field, the heliosphere, which envelops our entire solar system.\n\nAncient astronomers believed that the Earth was the center of the Universe, and that the Sun and all the other stars revolved around the Earth. Copernicus proved that Earth and the other planets in our solar system orbit our Sun. Little by little, we are charting the Universe, and an obvious question arises: Are there other planets where life might exist? Only recently have astronomers had the tools to indirectly detect large planets around other stars in nearby solar systems.\n\nSo basically the inner plantes have solid ground. The outer are made of gas except pluto.\n-good luck
19465
Jupiter is a wonderful planet to observe. Right now it is in the constellation of Libra.\n\nAssuming you are near Miami Jupiter rises about 2 in the morning. You can see it low and rising in the Southeast until about 6 when the sky starts to get bright.\n\nCheck the interactive chart below. Jupiter is an olive-drab circle with a curly 4 shape on it. Just set the time to London Time, so 6 in the morning Florida time would be 11:00:00 London Time.\n\nEnjoy!
652156
jupiter, i think it has 12
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Jupiter has four large moons and dozens of smaller ones (there are about 60 known moons so far). Galileo first discovered the four largest moons of Jupiter, Io, Europa, Ganymede, and Callisto in 1610, using a 20-power telescope; these moons are known as the Galilean moons. \n\nThe moons of Jupiter are (in order by their distance from Jupiter): Metis, Adrastea, Amalthea, Thebe, Io, Europa, Ganymede (the biggest), Callisto (the second biggest), Leda (the smallest), Himalia, Lysithea, Elara, Ananke, Carme, Pasiphae, Sinope, and many newly-discovered moons that haven't been named yet.
13326
Jupiter is definitely a planet, a gas giant type. Sometimes the Jovian system - the huge planet with its moons, taking their number and size of the largest ones, is referred to "LIKE a mini solar system". Jupiter is not a star though, and it is not a brown dwarf. Though Jupiter has a major gas atmosphere it still has a metallic core. A browm dwarf, an intermidiary between a star and planet, is totally made of gas, so there is a full convection between its outer and inner layers, unlike Jupiter.
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Jupiter has 63 moons, Saturn 56, Uranus 27 and Neptune 13.\n\nSaturn's ring system is best known and the most prominent. Though all four gas giants have rings. Though this is not well known.\n\nI suspect you are working from old information. i.e. out-of-date totals of moons and rings that have since been surpassed by further discoveries. That makes it a bit of detective work as to which planet's historical record you have been reading.\n\nSATURN  \n\nIn 1980 Voyager 1 increased the number of known Saturnian moons from 11 to 19. With Atlas being Saturn XV to be discovered. There appear to be 12 major rings (but many minor ones) and two of those are of recent discovery so perhaps your sources have not caught up with the latest Huygens-Cassini flybys and Hubble telescope surveys,\n\nNEPTUNE\n\nhas five, possibly six other rings and four ring arcs (incomplete rings) within the Adams ring. In order outwards:\n\nGalle \nuncertain    \nLeVerrier \nLassell  \nArago  \nunnamed    \nAdams \n\nArcs in Adams Ring \nFraternité  \nÉgalité  \nLiberté  \nCourage \n\nIn addition to its 13 moons, as of November 2006, there are five known Trojan asteroids of Neptune which have the same orbital period as the planet. They lie in the elongated, curved regions around the L4 and L5 Lagrangian points 60° ahead of and behind Neptune. These are 2001 QR322, 2004 UP10, 2005 TN53, 2005 TO74 and 2006 RJ103. But these are not moons: they rotate with the planet around the Sun.\n\nURANUS\n\nFive large moons (Titania, Oberon, Ariel, Umbriel and Miranda) were known in 1948. The flyby of the Voyager 2 space probe in January 1986 led to the discovery of a further 10 inner moons, bringing the total to 15. But 12 more have emerged since then.\n\nWikipedia lists 13 Uranian rings and NASA lists 10, but both state that two further rings were then found in 2005.\n\nJUPITER\n\nhas too few rings to meet the description provided.\n\nThe main ring is made of dust from the satellites Adrastea and Metis. \n\nInside the main ring is a torus of faint particles known as the halo. The gas torus consists of ions generated by Io's vulcanism that contributes significantly to radiation levels in Jupiter's vicinity.\n\nTwo wide gossamer rings encircle the main ring, originating from Thebe and Amalthea. \n\nFinally, there is a distant and very faint outer ring circling Jupiter backwards—retrograde of its spin. It is not known for sure where the material for this outer ring comes from, but it may be captured interplanetary dust.\n\nCONCLUSON\n\nAs Jupiter has too few rings and Neptune too few moons, you must mean Uranus or Saturn,\n\nI incline towards Uranus as its total of moons stopped at 15, and according to one account its total of rings stopped at 10 for a few years.
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Jupiter is just the largest planet in our solar system-that's like saying uncle Joe in the largest person who ever lived, cause he is the largest person in the family!  We have already identified over a dozen planets much larger than Jupiter in other solar systems.  We havent even identified all the galaxies in the universe (each of which contains around 100 billion stars, each star of which may contain 10 or so planets), let alone seen all the planets there are..
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32.675 AU for jupiter's circumference, and 2.406 AU for mercury.  Jupiter is the largest planet in our solar system.
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Scientists using NASA's Spitzer Space Telescope have discovered and directly imaged a small brown dwarf star, 50 times the mass of Jupiter, orbiting with a planet around a Sun-like star. Such an arrangement has never before been seen but might be common, the scientists say, leading to solar systems with distorted planetary orbits.\n\nKevin Luhman of Penn State University is the lead author on a report describing this discovery, which will be published in The Astrophysical Journal. The discovery concerns a class of the coldest brown dwarfs, called T dwarfs.\n\n\nThe detailed research paper on T dwarf - Ref\nhttp://www.science.psu.edu/alert/Luhman9-2006-2.htm
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Jupiter has more mass than all other planets combined.\n\nIt does not have more moons (that we know of) than the others combined.  Jupiter has 62 known moons, the rest have 77 together.\nhttp://www.spacetoday.org/SolSys/Moons/MoonsSolSys.html\n\nIt also does not have greater surface gravity than the others combined.  It does have the greatest surface gravity due to it's huge mass, but since it also has a huge radius, it's surface gravity is only 2.6 times that of earth, and less than half that of all other planets combined.\nhttp://erc.arc.nasa.gov/HowBig/gravity.htm
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Saturn.  It's my favorite planet.  I guess because it is so different from the other planets.
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Jupiter as of now has 63 recognised moons.  Dr. Scott Shepard maintains a wonderfull webpage detailing all of them, their names, physical data and discovery.  Rather than just copying and pasting a large block of text I recomend that you check out his web page for all the info you request.
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52 Europa, diameter 289 km, was discovered on February 4, 1858 by H. Goldschmidt. It is named after Europa, one of Zeus's conquests in Greek mythology.\n\nEuropa may be the seventh largest known asteroid (it cannot currently be ranked relative to 3 Juno) and is very dark in color. It belongs to the Hygiea asteroid family.\n\nIt should not be confused with Jupiter's moon Europa.\n\nNasa is preparing plans for a possible mission to Europa ( the MOON) that would put a lander on the surface. It has even been suggested that a mission could be devised that would drill through the ice layer and release a probe into the liquid underment. This is the "hydrobot" concept.\n\nWater or ice? Liquid or slushy or frozen solid? Ever since the Voyager spacecraft missions flew through the Jupiter system in 1979, planetary scientists have wondered about the layer of ice surrounding the second moon of Jupiter.\n\nEuropa's ice surface makes it one of the brightest, and smoothest, objects in our solar system.\n\nRecent Galileo spacecraft images have provided evidence that Europa had a liquid ocean underneath the frozen crust sometime in its history, but it is not clear if this ocean still exists. Of the various explanations proposed by scientists, most scenarios of Europa's evolution have the water layer freezing solid earlier in its history. The moon's surface is -260° F, which could freeze an ocean over several million years. But scientists think that the warming caused by a tidal tug of war with Jupiter and neighboring moons could be keeping large parts of the ocean liquid.
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No we still have a lot to learn about our solar system, especially the outer planets.  This is in part because they are fairly far away and it takes a while, and a good deal of funding to get out there.  In the case of the gasious Jovian planets this is also because we cant see beneath the very tops of their clouds.  There are strange things that appear to be going on in their interiors but it's hard to get data on this when the pressures would easily crush any spacecraft soon into its decent.
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Here is a link that should be perfect! Scroll down a bit and there is a table with all the data you could possibly want!  http://en.wikipedia.org/wiki/2003J6%28moon%29--_statistics_of_Jupiter%27s_Moon
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Jupiter has 63 known satellites.  Scott Shepard maintains one of the better acountings of planetary moons.