compare and contrast the 10th planet and pluto?
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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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http://www.seds.org/billa/tnp/pluto.html
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Twertyto's answer is the best! When I was just learning about astronomy I asked the same question. Someone told me a very simple answer that just might work for you:  A planet reflects light and a star creates it. That sounds simple enough for simpler times! But now welcome to the 21st century!!!\nBrown dwarfs are kind of the "animal" that bridges these two seemingly different objects. Astronomy is having a hard (but fun) time right now trying to decide exactly what a planet is- from the very large to the very small. Is an object 75 times the size of Jupiter a planet? 79 times? 81 times? No one seems to know. Do we call them planets or officially name them Brown Dwarfs. On the other side of the issue, is Pluto a planet? They just discovered a larger than Pluto object and several almost-the-size-of-Pluto objects out past Pluto's orbit. Are all of these planets? If Pluto's not a planet, but now has been discovered to have at least 3 moons (two new one's were just discovered recently), then what do we call it? \nThis has been a surprisingly tough answer for Astronomers as well, so not only is it a great question, but you- and everyone else- might have to stick around for a while for the difinitive answer!!!
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No, NOT Sedna!  (This is how bad information just multiplies.)\n\nSedna is smaller than Pluto, and unlikely to be classified a planet.  If anything will be classified as our 10th planet it is 2003 UB313, which is larger than Pluto.\n\nBut until then, we only have 9 official planets.
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Pioneer 10 never reached Pluto.  In fact, no probe ever has.  There is, however, a new space probe called New Horizons that will go to Pluto, and beyond.
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http://www.iau.org\nhttp://www.iau.org/fileadmin/content/pdfs/Resolution_GA26-5-6.pdf\n\non 24 august 2006, the international astronomical union reclassified pluto.\n\nhttp://en.wikipedia.org/wiki/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 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 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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Right now there are officially 9 planets. Depending on what we decide in the next year or so that number will change to 8, stay 9, go to 10, or even larger.  \n\nAn object larger than Pluto (2003 UB313) has been found, but we have not granted it official status as a planet. Don't expect this issue to be resolved any time soon, we've more or less "tabled" the issue until our general meeting in August, but there are a number of scientists in the IAU's Division of Planetary Sciences discussing this issue.\n\nRight now the newer astronomy textbooks generally have a section on "the planet controversy," and spend some time talking about all these newly discovered icy bodies.  They are all part of the Kuiper Belt, just like Pluto, and new books seem to be grabbing onto teaching about these objects much like the asteroids, addressing them as the left-overs of the formation of the solar system.  The Cosmic Perspective (a fairly decent intro astro textbook) for example has a chapter on "Remnants of Rock and Ice: Asteroids, Comets and Pluto"
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Yes. Pluto has an eliptic orbit (not perfectly circular) which means that sometimes it will be closer to the sun than Uranus and therefore the 8th.
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Designated 2003 UB313 (it hasn’t been officially named yet), this “planet” is slightly larger than Pluto, has a small moon and takes more than 500 Earth years to orbit the Sun.\nA planet is a body large enough that, when it formed, it condensed under its own gravity to be shaped like a sphere. It orbits a star directly and is not a moon of another planet.\n To simplify things, some scientists propose that the size of Pluto be designated the smallest size for a planet. If that argument carries the day, we now have 10 planets, since 2003 UB313 meets all the criteria.
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Pluto is not a planet anymore... it is now a "dwarf planet."\n\nWhen it is outside Neptune's Orbit, it is 8 planets away from the Sun and when it is inside Neptune's Orbit, it is 7 planets away from the Sun.  \n\nPluto has a very eccentric orbit and spends 20 year chunks of time closer to the Sun than Neptune.\n\nAloha
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Possibly, as scientists have yet to make up their mind. One particular object, originally found in 2003 but confirmed two years later by Mike Brown (Caltech), David Rabinowitz (Yale University), and Chad Trujillo (Gemini Observatory), has renewed the old debate about what constitutes a planet since it is at least 5% larger than Pluto with an estimated diameter of 2400 km . It currently has no name, but has been given the provisional designation 2003 UB313, and has been nicknamed "Xena" by its discoverers, after the television character. It has many similarities with Pluto: its orbit is highly eccentric, with a perihelion of 38.2 AU (roughly Pluto's distance from the Sun) and an aphelion of 97.6 AU, and is steeply inclined to the ecliptic plane, at 44 degrees, more so than any known object in the solar system except the newly-discovered object 2004 XR190. Like Pluto, it is believed to consist mainly of rock and ice, and has a moon . Whether it and the largest Kuiper belt objects should be considered planets or whether instead Pluto should be reclassified as a minor planet has not yet been resolved.
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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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all i can say is that NOTHING HAS CHANGED. pluto is still a PLANET. a full blown, fully acceptable PLANET. it has its own moon (Charon) and therefore its own gravitational pull stong enough to attract and HOLD ON TO an object over half its own size and mass. show me any other "asteroid","stationary comet" or even another "planet" capable of such a feat. however, just because ASTRONOMERS deem pluto lesser than it is, has no effect what so ever on ASTROLOGERS exept to piss us off.
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Well... Pluto isn't exactly a planet... some people speculate it is... others don't. Yes, another one has been discovered a while ago... I think it was Planet Nebula or something... in the far away galaxy of Cygnus (the constellation that resembles a goose)... You are talking about our solar system... right? I thought as much. In our solar system... there'd be 8 or 9, depending if you call Pluto a planet or not.\n\nEDIT: OK... there was one mass that could be considered a planet found in our solar system. It was called Ceres or something... found between Mars and Jupiter. Pluto may be an asteroid!
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Its all relative..usually we use sun as a point of a reference when we talk about relative size of planets which circle it. Pluto is about the same size as mercury.
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To begin with, pluto unlike the other planets does not orbit the same war around the Sun like the other planets. Pluto's orbit is oval. There will be a time where by pluto will be closer to the Sun then Neptune for every 22 years. So thats 1 point to think about. Also some scientist debate that Pluto is juz a passing by asteroid that got attracted to the solar system gravitational field. Pluto is also much smaller in size to be a gaseous planet comparing to Uranus or Neptune which is all gaseous planet.