what is the diameter and circumference of pluto?
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Pluto Statistics \nDiscovered by Clyde W. Tombaugh \nDate of discovery February 18, 1930 \nMass (kg) 1.27e+22 \nMass (Earth = 1) 2.125e-03 \nEquatorial radius (km) 1,137 \nEquatorial radius (Earth = 1) 0.1783 \nMean density (gm/cm^3) 2.05 \nMean distance from the Sun (km) 5,913,520,000 \nMean distance from the Sun (Earth = 1)) 39.5294 \nRotational period (days) -6.3872 \nOrbital period (years) 248.54 \nMean orbital velocity (km/sec) 4.74 \nOrbital eccentricity 0.2482 \nTilt of axis (degrees) 122.52 \nOrbital inclination (degrees) 17.148 \nEquatorial surface gravity (m/sec^2) 0.4 \nEquatorial escape velocity (km/sec) 1.22 \nVisual geometric albedo 0.3 \nMagnitude (Vo) 15.12 \nAtmospheric composition \nMethane\nNitrogen 0.3
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The distance between Earth and Pluto varies as the two planets move around their orbits. When they are closest, they are about 29 A.U. apart; at most, the distance is about 51 A.U. Since light travels about 300,000 kilometers each second, it would take light anywhere between 8 hours and 14 hours to make the round-trip journey to Pluto from Earth.\n\nRadio signals travel at the same speed as light. If you were using radio signals to control a robot on Pluto, you would have to be very patient. If you sent your robot a command to move, the command would arrive at least 4 hours later. Then, if your robot took a picture and sent it back to Earth, it would take at least 4 more hours before you could see that picture! \n\n\n\nAU\n\nAU, which stands for "astronomical unit", is a unit for measuring distance. One AU is the average distance from the Sun's center to the Earth's center. It is equal to 149,597,871 km (92,955,807 miles).\n\nAUs are often more convenient to use than kilometers when measuring large distances such as those in space. In this case kilometers are just too small - it would be like measuring the distance from Boston to San Francisco in inches. AUs simply make a measurement easier to understand and give you something to compare it to.\n\nFor example, Saturn's orbit around the Sun has an average radius of 9.5 AU, which means that Saturn is about ten times farther from the Sun than Earth is. The average distance from the Sun to distant Pluto is about 40 AU. Mercury, the planet closest to the Sun, orbits at an average distance of 0.39 AU.\n\nAUs are generally used for measurements of distances within our Solar System. Distances to stars are much larger, and are expressed in terms of light years. One light year is equal to more than 63,000 AUs. The nearest star, Proxima Centauri, is just over 4 light years away.\n\nAlthough Pluto was discovered in 1930, limited information on the distant planet delayed a realistic understanding of its characteristics. Today Pluto remains the only planet that has not been visited by a spacecraft, yet an increasing amount of information is unfolding about this peculiar planet. The uniqueness of Pluto's orbit, rotational relationship with its satellite, spin axis, and light variations all give the planet a certain appeal.\n\nPluto is usually farther from the Sun than any of the nine planets; however, due to the eccentricity of its orbit, it is closer than Neptune for 20 years out of its 249 year orbit. Pluto crossed Neptune's orbit January 21, 1979, made its closest approach September 5, 1989, and will remain within the orbit of Neptune until February 11, 1999. This will not occur again until September 2226.\n\nAs Pluto approaches perihelion it reaches its maximum distance from the ecliptic due to its 17-degree inclination. Thus, it is far above or below the plane of Neptune's orbit. Under these conditions, Pluto and Neptune will not collide and do not approach closer than 18 A.U. to one another.\n\nPluto's rotation period is 6.387 days, the same as its satellite Charon. Although it is common for a satellite to travel in a synchronous orbit with its planet, Pluto is the only planet to rotate synchronously with the orbit of its satellite. Thus being tidally locked, Pluto and Charon continuously face each other as they travel through space.\n\nUnlike most planets, but similar to Uranus, Pluto rotates with its poles almost in its orbital plane. Pluto's rotational axis is tipped 122 degrees. When Pluto was first discovered, its relatively bright south polar region was the view seen from the Earth. Pluto appeared to grow dim as our viewpoint gradually shifted from nearly pole-on in 1954 to nearly equator-on in 1973. Pluto's equator is now the view seen from Earth.\n\nDuring the period from 1985 through 1990, Earth was aligned with the orbit of Charon around Pluto such that an eclipse could be observed every Pluto day. This provided opportunity to col
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The New Horizons mission will make the planned closest approach to Pluto at 10,000 kilometers (6,200 miles) and will be going about 14 kilometers/second (31,300 miles per hour).\n\nSee the NASA website image at:\nhttp://pluto.jhuapl.edu/mission/images/pluto_encounter3.jpg\n\nHope this helps!
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Pluto\nFrom Wikipedia, the free encyclopedia\nJump to: navigation, search\nFor other uses, see Pluto (disambiguation).\nPluto   \nDiscovery \nDiscovered by Clyde W. Tombaugh \nDiscovered on February 18, 1930 \nOrbital characteristics (Epoch J2000) \nSemi-major axis 5,906,376,272 km\n39.481 686 77 AU \nOrbital circumference 36.530 Tm\n244.186 AU \nEccentricity 0.248 807 66 \nPerihelion 4,436,824,613 km\n29.658 340 67 AU \nAphelion 7,375,927,931 km\n49.305 032 87 AU \nOrbital period 90,613.3055 d\n(248.09 a) \nSynodic period 366.73 d \nAvg. Orbital Speed 4.666 km/s \nMax. Orbital Speed 6.112 km/s \nMin. Orbital Speed 3.676 km/s \nInclination 17.141 75°\n(11.88° to Sun's equator) \nLongitude of the\nascending node 110.303 47° \nArgument of the\nperihelion 113.763 29° \nNumber of satellites 3 \nPhysical characteristics \nDiameter 2390 km [1]\n(19% of Earth, or\n1485 mi) \nSurface area 1.795×107 km²\n(0.033 Earths) \nVolume 7.15×109 km³\n(0.0066 Earths) \nMass (1.305±0.007)×1022 kg [2]\n(0.0021 Earths) \nMean density 2.03±0.06 g/cm³ [3] \nEquatorial gravity 0.58 m/s²\n(0.059 gee) \nEscape velocity 1.2 km/s \nRotation period −6.387230 d\n(6 d 9 h 17 m 36 s) \nRotation velocity 47.18 km/h (at the equator) \nAxial tilt 119.59° (to orbit)\n112.78° (to the ecliptic) \nRight ascension\nof North pole 133.045±0.02°\n(8 h 52 min 11 s) [4] \nDeclination -6.145±0.02° \nAlbedo 0.49–0.66 (varies by 35%) [5] [6] \nSurface temp. min mean max \n33 K 44 K 55 K \n \nAdjective Plutonian \nAtmospheric characteristics \nAtmospheric pressure 0.30 pascals (summer maximum) \nComposition nitrogen, methane \nNote: This article contains special characters. \nPluto (IPA: /ˈpluːtəʊ/), designated (134340) Pluto in the Minor Planet Center catalogue, is the second-largest known dwarf planet in the solar system. It orbits between 29 and 49 AU from the Sun, and was the first Kuiper Belt Object to be discovered. Approximately one-fifth the mass of the Earth's Moon, Pluto is primarily composed of rock and ice. It has an eccentric orbit that is highly inclined with respect to the planets and takes it closer to the Sun than Neptune during a portion of its orbit. Pluto and its largest satellite, Charon, could be considered a binary system because they are closer in size than any of the other known planetoid/moon combinations in the solar system, and because the barycentre of their orbits does not lie within either body. However, the International Astronomical Union (IAU) has yet to formalize a definition for binary dwarf planets, so Charon is regarded as a moon of Pluto. Two smaller moons, Nix and Hydra, were discovered in 2005. Pluto is smaller than several of the natural satellites or moons in our solar system (see the list of solar system objects by radius).\n\nFrom its discovery by Clyde Tombaugh in 1930, Pluto was considered the ninth planet from the Sun. In the late 20th and early 21st century, many similar objects were discovered in the outer solar system, most notably the Trans-Neptunian object Eris which is slightly larger than Pluto. In August 2006 the IAU redefined the term "planet", and classified Pluto, Ceres, and Eris as dwarf planets.[1] Pluto is also classified as the prototype of a family of trans-Neptunian objects.[2][3] After the reclassification, Pluto was added to the list of minor planets and given the number 134340.[4][5]\n\nContents [hide]\n1 Discovery \n1.1 Relations to Neptune and Uranus \n1.2 Percival Lowell's influence \n1.3 Naming \n1.4 Symbol \n2 Physical characteristics \n2.1 Appearance \n2.2 Mass and size \n2.3 Atmosphere \n2.4 Composition \n2.5 Orbit \n2.5.1 Heliocentric distance \n2.6 Trans-Neptunian object \n2.7 Comet comparison \n3 Moons \n3.1 Charon \n3.2 Nix and Hydra \n3.3 Distribution \n3.4 Additional moons? \n4 Exploration of Pluto \n5 Planetary status controversy \n5.1 Omission from museum models \n5.2 Commemoration as a planet \n5.3 New discoveries ignite debate \n5.4 IAU Decisio
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Pluto: 1(2 moons nix and hydra have newly been discovered inreasing the number to 3)\nUranus: 27\nSaturn: 56\nNeptune: 13
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Pluto is the farthest planet from the sun. Its average distance from the sun is 3,670,050,000 miles (5,906,380,000 kilometers).
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Pluto is more likely to be a KBO, or a Kuiper Belt Object. By this theory it's been around since the solar system began. There are other objects in this area of space that equal the size of Pluto.
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Wow, just asked my 10year old same question.  He said it is a planet they have recently discovered about twice the distance of Pluto.
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Rotation: 6 Earth days is the length of one of Pluto's days...also... Revolution: 1 year on Pluto = 248 Earth years
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Pluto was discovered by the astronomer Clyde Tombaugh at the Lowell Observatory in Arizona on February 18, 1930 after an extensive search when he compared photographic plates taken on January 23 and 29. After the observatory obtained confirming photographs, the news of the discovery was telegraphed to the Harvard College Observatory on March 13, 1930. The planet was later found on photographs dating back to March 19, 1915. Tombaugh was searching for a "Planet X" to explain discrepancies in the predicted orbit of Neptune. It is now known these discrepancies were an artifact of the slightly incorrect value then assumed for the mass of Neptune.
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The International Astronomical Union decided that Pluto was no longer a planet.  Instead, they decided to classify it as a "dwarf planet".\n\nSee the details below.\n\nRESOLUTION 5A\nThe IAU therefore resolves that "planets" and other bodies in our Solar System, except satellites, be defined into three distinct categories in the following way:\n\n(1) A "planet" [footnote 1] is a celestial body that (a) is in orbit around the Sun, (b) has sufficient mass for its self-gravity to overcome rigid body forces so that it assumes a hydrostatic equilibrium (nearly round) shape, and (c) has cleared the neighbourhood around its orbit.\n\n(2) A "dwarf planet" is a celestial body that (a) is in orbit around the Sun, (b) has sufficient mass for its self-gravity to overcome rigid body forces so that it assumes a hydrostatic equilibrium (nearly round) shape [footnote 2] , (c) has not cleared the neighbourhood around its orbit, and (d) is not a satellite.\n\n(3) All other objects [footnote 3] except satellites orbiting the Sun shall be referred to collectively as "Small Solar-System Bodies".\n\n\nFootnote 1: The eight "planets" are: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune.\n\nFootnote 2: An IAU process will be established to assign borderline objects into either dwarf planet and other categories.\n\nFootnote 3: These currently include most of the Solar System asteroids, most Trans-Neptunian Objects (TNOs), comets, and other small bodies.\n\nRESOLUTION 6A\nThe IAU further resolves:\n\nPluto is a "dwarf planet" by the above definition and is recognized as the prototype of a new category of trans-Neptunian objects.
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Tiny Pluto is the last planet in our family. The dark, cold planet's average distance from the Sun is a little over 3.5 billion (3,500,000,000) miles. If you tried to step off this distance, you would be over two miles away from your Sun when you reached the location of Pluto. If you got on a jet and flew at 600 miles per hour from the Sun to Pluto, it would take 675 years. If you could drive the same distance, it would take over 5,700 years.
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The average temperature of Pluto is 44 K, -229 degrees C, or -380 degrees F.  The coldest ever there was 33 K, -240 degrees C, or -400 degrees F.  The hottest ever there was 55 K, -218 degrees C, or -361 degrees F.
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Pluto is 6 Billion kilometers away from the sun.  Light takes about 5.5 hours to reach Pluto.  Which means Pluto is only 6 light HOURS away from the sun.
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Its a planet!!  On a serious note try this link\n\nhttp://en.wikipedia.org/wiki/Pluto\n\n:) Hope this helps........
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Pluto. \n\nThe International Astronomical Union (IAU), at a meeting in August 2006, voted on their first "official" definition of a planet. Based on this new definition, Pluto is no longer a planet. According to the IAU's definition, our Solar System has eight planets: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. In the new scheme, Pluto will be one of several "dwarf planets" in the Solar System; but "dwarf planets" are not considered true planets. THere is still a lot of disagreement within the community on the definition of a planet.\n\nHere's the definition of a planet (found at wikipedia): \n\nThe International Astronomical Union defines "planet" as a celestial body that, within the Solar System,\n\n(a) is in orbit around the Sun; \n(b) has sufficient mass for its self-gravity to overcome rigid body forces so that it assumes a hydrostatic equilibrium (nearly round) shape; and \n(c) has cleared the neighbourhood around its orbit; \nor within another system, \n\n(Pluto fails to meet the third condition above)\n\n(i) is in orbit around a star or stellar remnants; \n(ii) has a mass below the limiting mass for thermonuclear fusion of deuterium; and \n(iii) is above the minimum mass/size requirement for planetary status in the Solar System.
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Circumference\n\nC = 2 π r\n\nC = 2(3.141592654)(1)\n\nC = 6.283185307\n\nC = 6.28 Feet rounded to two decimal places\n\nThe answer is C - 6.28\n\n- - - - - - - - - - - - - - - -\n\nArea of a circle\n\nA = π r²\n\nA = 3.141592654 (1)²\n\nA = 3.14 Squared feet. Rounded to two decimal places\n\nThe answer is A - 3.14\n\n- - - - - - - s-