What is the largest moon in the solar system? How big is it? What planet does it orbit?
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Ganymede. It orbits Jupiter.
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The largest "planet" by mass currently known is HD 168443 c, which orbits the star HD 168443, a sunlike star located 123.5 light years from our own solar system. HD 168443 c orbits its star at a distance of 2.87 AU (430.5 million km) and completes one orbit of its star every 1739.5 days. Its mass is known to be at least 17.1 times that of Jupiter, and is suspected to be 34 times that of Jupiter (there is, as you can see, a lot of uncertainty in the measurment). This means that technically, it's considered a small brown dwarf rather than a planet, although the distinction is somewhat academic.\n\nP.S. it's Jupiter, not Jupitar.
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Yes, our moon orbits our planet, and together they orbit our sun.  Also, our solar system orbits the center of our galaxy.
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Io is a large, rocky, volcanically active moon of Jupiter. Its volcanoes spew out molten sulfur, making Io a very colorful moon. It is the innermost of Jupiter's four large moons and the third largest. It has a diameter of 1,942 miles (3,636 km), very close in size to our moon. Io's mean distance from Jupiter is 220,000 miles (422,000 km). It has a mass of 8.93x1022 kg. It takes Io 1.77 days to orbit Jupiter. There is a doughnut-shaped plasma cloud around Jupiter near Io's orbit (known as the "Io plasma torus") This torus is caused by Jupiter's strong magnetic field, which strips ions from Io as it rotates; Io acts like an electrical generator. Io was discovered by Galileo and Marius (independently) in 1610. \n\nGanymede is the largest moon of Jupiter, a large, icy, outer moon that is scarred with impact craters and many parallel faults. It has a diameter of about 3,400 miles (5,268 km) and orbits Jupiter at a mean distance of 664,000 miles (1,070,000 km). It has a magnetic field and probably has a molten iron core. It takes Ganymede 171.75 hours (7.15 Earth days) to orbit Jupiter. Its mass is 1.48x1023 kg. It was discovered by Galileo and S. Marius (independently) in 1610. Ganymede is the largest moon in the solar system; it is also larger than the planets Mercury and Pluto.\n\nEuropa is a large, dense, icy moon of Jupiter. Europa is the smoothest object in our Solar System. Its surface is covered with long, crisscrossing trackways (but few craters) on water ice. Frozen sulfuric acid has been found on its surface. Europa's diameter is less than 2,000 miles (3,138 km), smaller than the Earth's moon. It takes Europa 3.55 days to orbit Jupiter (in a synchronous orbit). Its mean distance from Jupiter is about 420,000 miles (670,900 km). Its mass is 4.80x1022 kg. It was discovered by Galileo and S. Marius (independently) in 1610.
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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.
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UB-313 (also known as "Xena"). This is the only "tenth planet" that has a moon and is larger than Pluto.\n\nThere are several other "planetoids" or "plutinos" including Sedna, Quaoar, Ixion, Varuna, and Orcus.
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Tons!\n\nA moon is simply a large object that orbits a planet.\n\nThere are a total of 137 moons in our solar system. Here's the list of names and associated planets (see sources):
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Well it sounds like they all have their very own opinion. I found this wonderful site, it is trust worthy ... it's an on line encyclopedia and was just updated May 30th.\n    Jupiter has at least 63 natural satellites (also called moons!) \n    Saturn has a large number of moons, however no one will ever be certain of the precise number because the floating chunks of ice in Saturn's rings technically count as moons and it is difficult to draw a distinction between a large ring particle and a moon. One cool thing about Saturn is that it has the moon named Titan, which you have probably heard of because it is the only moon in our solar system that has a dense atmosphere. \n   If you decide to check out this site, just scroll down and click on the planet of your choice and it will take you to all the info on that planet, then click on natural satellites. Best of luck to you and search for the truth about these moons!
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Here is a quick page of info for ya. Hopes this helps.\n\nhttp://teacher.scholastic.com/researchtools/articlearchives/space/moon.htm
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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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There are 47 known moons. You can answer you're own question by going here.\nhttp://sci.esa.int/science-e/www/object/index.cfm%3Ffobjectid%3D35229
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The name of our planet is the Earth. The name of our moon is the Moon. The name of our solar system is the Solar System. \n\nNotice that I capitalize them, because when used as names, they are proper nouns. This also helps us distinguish between the planet Earth and earth (meaning soil), between the Earth's Moon and moon (meaning the natural satellite of a planet), and between our Solar System and any other solar systems (since any system containing a star and a planet or a planet-forming disk can be called a solar system.) \n\nThis is the usage approved by the International Astronomical Union, the body in charge of naming celestial objects. It may seem odd that these important objects don't have names, but if you think about it, it just reinforces their importance. For example, the Moon is the Moon, not just any moon. It requires no other name, because it's the most important moon! \n\nYou may read or hear people using Luna for the Moon, or Terra or Gaia for the Earth, or Sol for the Sun, but these are poetic terms, often seen in science fiction stories, but not used by astronomers in scientific writing.
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The Moon is Earth's only natural satellite. It has no formal English name other than "the Moon", although it is occasionally called Luna (Latin: moon), or Selene (Greek: moon), to distinguish it from the generic term "moon" (referring to any of the various natural satellites of other planets). Its symbol is a crescent (). The related adjective for the Moon is lunar (again from the Latin root), but this is not found in combination, the combining forms seleno-/-selene (again from the Greek) and -cynthion (from the Lunar deity Cynthia) being used in terms relating to the Moon in various other contexts (e.g. aposelene, selenocentric, pericynthion, etc.).\n\nThe average distance from the Moon to the Earth is 384,401 kilometres (238,857 mi). The Moon's diameter is 3,476 kilometres (2,160 mi). Reflected sunlight from the Moon's surface reaches Earth in approximately 1.3 seconds (at the speed of light). The Moon is the Solar System's fifth largest moon, both by diameter and mass, ranking behind Ganymede, Titan, Callisto, and Io.\n\nThe Soviet Union's (USSR) Luna program was the first to reach the Moon with unmanned vehicles, or space probes: The first man-made object to escape Earth's gravity and pass near the Moon was Luna 1 in 1959. The first man-made object to impact the lunar surface was Luna 2, also in 1959. The first photographs of the normally occluded far side of the Moon were made by Luna 3 in the same year. The first spacecraft to perform a successful lunar soft landing was Luna 9 in 1966. The first (unmanned) vehicle to orbit the Moon was Luna 10 in 1966.\n\nThe United States' Apollo program achieved the first (and only) manned missions to the Moon: The first manned mission to orbit the Moon was Apollo 8 in 1968, and the first people to land and walk on the Moon came aboard Apollo 11 in 1969. The unsuccessful Soviet manned Moon project was abandoned in 1974. The Moon is the only celestial body other than the Earth upon which humans have set foot.\n\nThe two sides of the Moon\nThe Moon is in synchronous rotation, meaning that it keeps nearly the same face turned toward Earth at all times. Small variations resulting from the finite eccentricity of the lunar orbit, termed optical librations, allow up to about 59% of the lunar surface to be visible from Earth. The side of the Moon that faces Earth is called the near side, and the opposite side is called the far side. The far side should not be confused with the dark side, as the unilluminated hemisphere only corresponds to the far side during full moon. In fact, the far side receives (on average) slightly more sunlight than the near side due to lunar eclipse. Spacecraft are cut off from direct radio communication with Earth when behind the Moon due to line-of-sight propagation. One distinguishing feature of the far side is its almost complete lack of maria (singular: mare), which are the dark albedo features.\n\nOrbit and relationship to Earth\n \nA scale model of Earth and the MoonMain articles: The Moon's orbit and Earth and Moon\nSee also: Libration \nThe Moon makes a complete orbit about the Earth approximately once every 27.3 days. It is at present in its 4th quarter, illuminated by ca. -155% . Unlike most satellites of other planets, the Moon orbits near the ecliptic and not the Earth's equatorial plane.\n\nThe Earth and Moon have many physical effects upon one another, including the tides. Most of the tidal effects seen on the Earth are caused by the Moon's gravitational pull, with a smaller contribution from the Sun. Tidal effects result in an increase of the mean Earth-Moon distance, over long periods of time, of about 4 meters per century. As a result of the conservation of angular momentum, the increasing semimajor axis of the Moon is accompanied by a gradual slowing of the Earth's rotation.\n\nThe Earth-Moon system may be considered to be a double planet rather than a planet-moon system.[3] This is due
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Saturn is the sixth planet from the Sun and the second-largest planet in our solar system. Only Jupiter is larger. In spite of it's giant size, though, Saturn doesn't weigh very much. In fact, as a whole,Saturn is lighter than water and would float in a bathtub if you had one big enough (of course the water bill would be extremely high).
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orbit:    57,910,000 km (0.38 AU) from Sun\n        diameter: 4,880 km\n        mass:     3.30e23 kg\nMercury is the innermost and smallest planet in the solar system, orbiting the Sun once every 88 days. It ranges in brightness from about −2.0 to 5.5 in apparent magnitude, but is not easily seen — its greatest angular separation from the Sun (greatest elongation) is only 28.3° (it can only be seen in twilight). Comparatively little is known about the planet: the only spacecraft to approach Mercury was Mariner 10 from 1974 to 1975, which mapped only 40%–45% of the planet's surface.\n\nPhysically, Mercury is similar in appearance to the Moon as it is heavily cratered. It has no natural satellites and no substantial atmosphere. The planet has a large iron core which generates a magnetic field about 1% as strong as that of the Earth. Surface temperatures on Mercury range from about 90 to 700 K (-180 to 430°C) , with the subsolar point being the hottest and the bottoms of craters near the poles being the coldest.\n\nThe Romans named the planet after the fleet-footed messenger god Mercury, probably for its fast apparent motion in the twilight sky. The astronomical symbol for Mercury, displayed at the top of the infobox, is a stylized version of the god's head and winged hat atop his caduceus, an ancient astrological symbol. Before the 5th century BC, Greek astronomers believed the planet to be two separate objects: one visible only at sunrise, the other only at sunset. In India, the planet was named Budha (बुध), after the son of Chandra (the Moon). The Chinese, Korean, Japanese, and Vietnamese cultures refer to the planet as the water star, based on the Five Elements. The Hebrews named it Kokhav Hamah (כוכב חמה), "the star of the hot one" ("the hot one" being the Sun).
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If your question is : "how much space is in the solar system?" --\n\nThe solar system is a sphere occupying approximately 7.244^29 (7.244 followed by 29 zero's) miles\n\nIf that's not your question then I don't have the foggiest notion of what you're asking.
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Jupiter has 63 moons or "natural satellites" ... http://www.answers.com/jupiter's%20moons\n\nThey have ALL been named ...\n\nThe Voyager 1 mission discovered three inner moons in 1979, bringing the total then known to 16 (17 if one counted Themisto, which had been found but then lost in 1975). The total rested there until 1999. Since then, researchers using sensitive ground-based detectors have recovered Themisto and found a further 46 tiny moons in long, eccentric, generally retrograde orbits. They average 3 kilometres in diameter, and the largest is barely 9 km across. All of these moons are thought to be captured asteroidal or perhaps cometary bodies, possibly fragmented into several pieces, but very little is actually known about them. The total number of known moons of Jupiter now stands at 63, currently the most of any planet in the solar system. Many additional tiny moons may exist that have not yet been discovered.