help me ... please .. i just want to know about pluto?
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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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read http://en.wikipedia.org/wiki/Pluto\n\nno, pluto does orbit the sun, is ball-shaped, does not have an isolated orbit (a bunch of other similar bodies have similar orbits.), and is not a satellite so it is not a planet.\n\ni have been waiting for this since i was about ten when i learned that pluto didn't fit the pattern set by the major bodies in the solar system so it was an anomaly.  it just felt "out of place".  now that astronomers have found hundreds of other bodies with similar orbits, classifying "134340 pluto" as a planet is even more irrational.  i feel somewhat satisfied, but i don't know how long this will drag on tho.  many planetary astronomers are satisfied that the definition is rigorous enuf.  i can accept that the definition is flawed, but i can not accept that "134340 pluto" is a planet.\n\nthis was the right thing to do, believe me.  this does not change anything about pluto or the solar system.  this just corrects the mistake of classifying pluto as a planet initially.\n\nmany astronomers consider pluto and charon to be a binary system, but two small bodies orbit that system.  they are called nix and hydra.\n\nincidentally, "134340 pluto" was never a moon of neptune.  neptune did capture triton. this is why triton has a retrograde orbit.
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Pluto is 4,583,000,000 miles from the sun at maximum; 2,757,000,000 at minimum.  Since Neptune goes out as far as 2,824,000,000 it is occasionally closer in than Neptune!
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No.\n\nIts likely even that Pluto will be relegated to being a Kuiper belt object rather than a plnet, leaving just 8.\n\nKuiper belt objects are regularly discovered.
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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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http://en.wikipedia.org/wiki/Pluto\nhttp://www.iau.org/fileadmin/content/pdfs/Resolution_GA26-5-6.pdf\n\non 24 august 2006, the international astronomical union reclassified pluto.\n\npluto does orbit the sun, is ball-shaped and is not a satellite, but it does not have an isolated orbit (a bunch of other similar bodies have similar orbits.) so it is not a planet.\n\ni have been waiting for this since i was about ten when i learned that pluto didn't fit the pattern set by the major bodies in the solar system so it was an anomaly. it just felt "out of place". now that astronomers have found hundreds of other bodies with similar orbits, classifying "134340 pluto" as a planet is even more irrational. i feel somewhat satisfied, but i don't know how long this will drag on tho. many planetary astronomers are satisfied that the definition is rigorous enuf. i can accept that the definition is flawed, but i can not accept that "134340 pluto" is a planet.\n\nthis was the right thing to do, believe me. this does not change anything about pluto or the solar system. this just corrects the mistake of classifying pluto as a planet initially.\n\nthis same thing happened has happened before.  in 1800, an astronomer found a body orbiting the sun between the orbits of mars and jupiter and thought it was a planet.  astronomers finally stopped classifying them as planets after they found several other bodies with similar orbits, and no one thinks ceres, pallas, juno, and vesta are planets today.\n\nmany astronomers consider pluto and charon to be a binary system, but two small bodies orbit that system. they are called nix and hydra.\n\nincidentally, "134340 pluto" was never a moon of neptune. neptune did capture triton. this is why triton has a retrograde orbit
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The tenth planet is like really great, thanks for asking.  He spins around and around and makes one revolution around the sun about once every several thousand thousand years.  Therefore you might call this tenth planet (he doesn't mind) a chunk of ice, and not really planet-like at all.  But wait, you're saying, Pluto is a chunk of ice and also a planet!  Well, Pluto actually (he's telling me now) doesn't even consider himself a planet, as he's really just a large ice-chunk in the Kuiper Belt.  The tenth planet (we'll call him "Frank", that's what he prefers) is a little peeved that Pluto gets a thousand-brother belt to wear and all he's got is the occasional through-comet.  We can't help you, Frank, I'm sorry.  We're like, a billion miles away.
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Let's try to see this from Pluto's point of view.\n\nPluto received news in 1930 that the folks on Earth had proclaimed him as a Planet, putting him in a very exclusive group of Solar System inhabitants.\n\nPluto was very flattered indeed.\n\nPrior to this, he had been minding his own business, hurting nobody, as you rightly pointed out.  Well, almost nobody...  There were those pesky little rocks in the neighborhood that he just had to shoo away, like the little toddlers that sometimes walk right up to you in the mall.  But it wasn't very often, and Pluto was generally very well behaved in his 3:2 resonant orbit with the local neighborhood big guy, Neppy-whats-his-face.\n\nBut hey, if the folks on Earth put Pluto with Neppy, more power to you guys!\n\nBut the truth is, Pluto has been around for a long, long time, quietly doing his rounds.\n\nNow, you Earthlings decide to take away - some say "dethrone" - his title as a Planet.  Oh, the audacity!...\n\nBut in reality, the insult is felt by Pluto's friends on Earth (including yours truly).  Pluto heard about the raucous in August, but you know what?\n\nHe's still doing his rounds in the cold, dark outer reaches of our stellar neighborhood quietly and without complaining.  He's been doing it for many millennia now.  Maybe, when the boredom gets to him - or perhaps when a fit of playfulness seizes him - he may send a icy piece of rock heading our way, but I'm sure he'll aim to miss.\n\nPluto is a nice guy.  He never hurt anyone except those pesky toddler rocks.  I'm sad for him, but he knows he has friends down here.  He and his chums in the Kuiper Belt are probably laughing at Earthlings who can't seem to make up our minds.\n\nI heard Xena was about to call a neighborhood party to celebrate her ascension.  She's pissed.  Maybe she's the one who'll hurl that rock at us...
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The better question is what about the planets they found farther out in the galaxy than Pluto.  Why don't we know their names, and why aren't they taught in schools?\n\nThey can take away our little Pluto, but not give us any new planets in return? Boo!
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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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All of the above are incorrect in terms of the semantics of what "officially" makes a planet a planet. You need to look at the IAU (International Astronomical Union) definition of planet to see why Pluto is now defined as a dwarf planet\n\nFirst, why does Pluto not fit the IAU planet defintion?\n\n(1) A "planet"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\nPluto fails in "c".  Personally, I think "neighborhood" should be definined in terms of an orbital dynamics phase space since it never comes close to Neptune due to the 3:2 resonance  of their  orbits: my opinion and $3.95 will get you decaf latte at Starbucks. (Hmm... Neptune has not cleared Pluto out of ITS orbit either. . . maybe they know about some other icy bodies in Pluto's orbit?)\n\nPluto DOES meet the qualifications  for a dwarf planet.\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) shape2, (c) has not cleared the neighbourhood around its orbit, and (d) is not a satellite.
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*Pluto: officially the 9th planet in our solar system\n*10th planet: nothing officially has this designation.\n\nIf you are talking about 2003 UB313, then there is a comparison to be made.  They both live in a similar part of the solar system, but it looks like UB313 seems to be a bit redder than Pluto.  Pluto is also known to have a transient atmosphere, not measurements of a potential atmosphere of UB313 have yet been published.
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It's actually just a large asteroid, and they haven't decided whether to call it a planet yet. Problem is, they also discovered that Pluto is just a large asteroid, and if they disacknowledge the new planet, they would have to also disacknowledge Pluto.
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PLUTO HAS NOT GONE ANYWHERE. IT IS STILL REVOLVING BUT THE SCIENTIST HAVE PROVED THAT PLUTO IS NOT A PLANET BECAUSE PLUTO IS THE OBJECT IN KUPIER BELT. THE NEW PLANETS ARE CERES, XENA & CHARON . FIRST WE SAY THE NAME OF PLANET LIKE THIS mY VERY EDUCATED MOTHER JUST SHOW US THE NINE PLANET.  NOW, THIS HAS BEEN PROVED WRONG. THE KNEW SYSTEM IS GIVEN BELOW. THIS INCLUDE 11 PLANET.\n\nMERCURY\nVENUS\nEARTH\nMARS\nCERES\nJUPITER\nSATURN\nURANUS\nNEPTUNE\nXENA\nCHARON
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That's right because Pluto, in fact, may actually be an asteroid and not a planet at all.  It was thought for years that Pluto is a planet, and likely not formally *changed* persay, but it's the largest mass found in an asteroid belt, and, being spherical, it was assumed to be a planet.\n\nScience and the invention of things like the Hubble telescope have shown us more detail on such things as galaxies, planets, asteroid belts, etc.
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Pluto has 3 moons (Charon,S/2005 P1,S/2005 P2)\nVenus has none\nSee all about moons in the solar system in\nhttp://www.windows.ucar.edu/tour/link=/our_solar_system/moons_table.html
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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.