What is the biggest star in the solar system called?
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The ONLY star in the solar system is the Sun.
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Yes many stars ar bigger than the Sun. The Sun is a middle aged small to mid sized star. Some of the really giant stars would even overlap the earth's orbit if they were placed where the Sun is. \n\nRefer the following links for some more info on stars.
491971
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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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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Star's are for the most part the same as our star/sun. The difference being we named our star The Sun.
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The biggest known star is the Pistol Star.Its size is about 100 times the Sun!It is ten million times brighter than the sun.It is also largest in terms of volume.   Born up to three million years ago, the Pistol Star may have weighed up to 200 times the mass of the Sun before shedding much of its weight in violent eruptions that began about 4,000 to 6,000 years ago.The Pistol Star is invisible to the naked eye because it is hidden 25,000 light-years away behind great dust clouds in the center of our Milky Way Galaxy.It is located in Pistol Nebula in the centre of Milky Way Galaxy.
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Our sun is a star.  All stars could be called suns.  As for the size of space....  some theorize that space is expanding, some say that space is contracting, so I think there is no real answer to your question.  Personally, I think this goes beyond science and into meta-physics.
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As of right now we don't know sizes of other planets outside our solar system.\n\n But, Jupiter is the largest planet in the Solar System. With an equatorial diameter of 143,884 km, (89,405 miles), it is as wide as more than 11 Earths stacked side by side. The planet also has the shortest period of rotation - Jupiter days last just under ten hours.
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MERCURY: Closest to sun. Smallest in diameter.\nVENUS: Dense cloud cover. Hot surface temperature.\nEARTH: Home to humanity. High mineral content.\nMARS: Largest volcano (Olympus Mons) in solar system. Largest canyon in the solar system.\nSATURN: Surrounded by rings. Smallest gas giant in our solar system.\nJUPITER: Largest celestial body in the solar system (not counting the sun itself). Deepest gravity and atmosphere well.\nURANUS: It rotates on its side (pole points toward sun). Only planet with a Greek (rather than Roman) name.\nNEPTUNE: Has the largest moon (Triton) to orbit backward around a planet. Has the highest wind velocity (>1400 m/s).\nPLUTO: Alternates with Neptune for being "most distant" from the sun. Hotly debated whether it is actually a "planet".
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Sirius (the Dog Star)\n\nList of the 100 Brightest stars:\nhttp://en.wikipedia.org/wiki/List_of_brightest_stars
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Many of the obvious celestial bodies have names which are carried over from tradition and history.  Examples include Terra (the Earth), Luna (the moon), Sol (the sun), Neptune, Venus, Mars, etc.  You'll note many of these carry the names of Greek gods.  However, today the International Astronomical Union uses a variety of naming conventions to assign proper names to the objects in our universe.  When a new object is observed, the Union uses its rules to name it so that scientists around the world can use a 'common language' when discussing it.  Examples of star names include Polaris (the North Star, located at the Celestial North Pole), Proxima Centauri (the closest known star) and Wolf 359, a real star system that was chosen as the site for a legendary battle with the Borg in the 'Star Trek' universe.  You might read the link in the 'sources' section for more information.\nPS: Websites that let you 'name a star' are purely cosmetic and the assigned names are in no way recognized by the Union or printed in academic star charts.  You would be better off using a desktop publishing program and designing a nice 'plaque' yourself if you wanted to make a gag gift.
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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 is the largest planet in the solar system. Its diameter is 88,846 miles (142,984 kilometers), more than 11 times that of Earth, and about one-tenth that of the sun. It would take more than 1,000 Earths to fill up the volume of the giant planet. When viewed from Earth, Jupiter appears brighter than most stars. It is usually the second brightest planet -- after Venus.\n\nJupiter is the fifth planet from the sun. Its mean (average) distance from the sun is about 483,780,000 miles (778,570,000 kilometers), more than five times Earth's distance. Ancient astronomers named Jupiter after the king of the Roman gods.\n\nAstronomers have studied Jupiter with telescopes based on Earth and aboard artificial satellites in orbit around Earth. In addition, the United States has sent six space probes (crewless exploratory craft) to Jupiter.\n\nAstronomers witnessed a spectacular event in July 1994, when 21 fragments of a comet named Shoemaker-Levy 9 crashed into Jupiter's atmosphere. The impacts caused tremendous explosions, some scattering debris over areas larger than the diameter of Earth.\n\nPhysical features of Jupiter\n\nJupiter is a giant ball of gas and liquid with little, if any, solid surface. Instead, the planet's surface is composed of dense red, brown, yellow, and white clouds. The clouds are arranged in light-colored areas called zones and darker regions called belts that circle the planet parallel to the equator.\n\nOrbit and rotation\n\nJupiter travels around the sun in a slightly elliptical (oval-shaped) orbit. The planet completes one orbit in 4,333 Earth days, or almost 12 Earth years.\n\nAs Jupiter orbits the sun, the planet rotates on its axis, an imaginary line through its center. The axis is tilted about 3¡. Scientists measure tilt relative to a line at a right angle to the orbital plane, an imaginary surface touching all points of the orbit.\n\nJupiter rotates faster than any other planet. It takes 9 hours 56 minutes to spin around once on its axis, compared with 24 hours for Earth. Scientists cannot measure the rotation of the interior of the giant planet directly, so they have calculated the speed from indirect measurements. They first calculated the speed using an average of the speeds of the visible clouds that move with interior currents, except for a more rapid zone near the equator.\n\nJupiter sends out radio waves strong enough to be picked up by radio telescopes on Earth. Scientists now measure these waves to calculate Jupiter's rotational speed. The strength of the waves varies under the influence of Jupiter's magnetic field in a pattern that repeats every 9 hours 56 minutes. Because the magnetic field originates in Jupiter's core, this variation shows how fast the plant's interior spins.\n\nJupiter's rapid rotation makes it bulge at the equator and flatten at the poles. The planet's diameter is about 7 percent larger at the equator than at the poles.\n\nMass and density\n\nJupiter is heavier than any other planet. Its mass (quantity of matter) is 318 times larger than that of Earth. Although Jupiter has a large mass, it has a relatively low density. Its density averages 1.33 grams per cubic centimeter, slightly more than the density of water. The density of Jupiter is about 1/4 that of Earth. Because of Jupiter's low density, astronomers believe that the planet consists primarily of hydrogen and helium, the lightest elements. Earth, on the other hand, is made up chiefly of metals and rock. Jupiter's mix of chemical elements resembles that of the sun, rather than that of Earth.\n\nJupiter may have a core made up of heavy elements. The core may be of about the same chemical composition as Earth, but 20 or 30 times more massive.\n\nThe force of gravity at the surface of Jupiter is up to 2.4 times stronger than on Earth. Thus, an object that weighs 100 pounds on Earth would weigh as much as 240 pounds on Jupiter.\n\nThe atmosphere of Jupiter is composed of abou
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Pluto is estimated to have a radius that is no more than 1200 km.\n\nMoons in the solar system that are larger than this organized by planet:\n\nEarth - Moon (1738 km)\nJupiter - Io (1815 km)  \nJupiter - Europa (1570 km)  \nJupiter - Ganymede (2630 km)  \nJupiter - Callisto (2400 km)\nSaturn - Titan (2575 km)\nSaturn - Triton (1350 km)\n\nJust for comparison the largest asteroid in the solar system is Ceres (466 km).\n\nAlso Ganymede and Titan are larger than Mercury (2440 km).
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Proxima Centauri is a puny whimper of a star, a red dwarf (spectral type M5.5 V). It is gravitationally bound to Alpha Centauri, a double star system. It consists of Alpha Centauri A and Alpha Centauri B. A and B are stars very much like the sun (spectral type G2 V and K0 V) except they orbit around a common center of gravity. Although being the closest star to earth Proxima is so faint it can only be seen with a telescope (from the southern hemisphere to boot). Not even Alpha Centauri, despite being TWO stars, is the brightest star in the night sky. But what Proxima misses out in brightness it makes up for in longevity. The sun, you may know, is in it´s main sequence right now and it will remain there for atleast a few billion years more. That may seem like a long time but proxima will remain on the main sequence for a TRILLION years!
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The brightest star as seen from the Earth is Sirius, not the sun, whose scientific name is Helios, nor the North Star, whose name is Polaris.  Sirius is located in the constellation Canis Major.  It is also known as the Dog Star.\n\nhttp://en.wikipedia.org/wiki/Sirius
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The Sun is the only star in the Solar System, otherwise we would see 2 suns instead of one.\n\nI believe what you mean is Sheliak, which is located on top of 33 degrees, 21 minutes, and 46 seconds N latitude.