in what order did he planets found?
102408
The solar system is believed to be approximately 4.6 billion years old. We do not know in what order they were formed other than it was approximately 100 million years after the sun was formed.
164779
we already found a 10th planet in our solar system, but it's still unclear if it's considered as planet (some say it is too small).\nThe name of the "10th planet" is Sedna.
314229
The new things they discovered are Sedna and Quaoar. So there could be 11 planets\nThe planet Quaoar  is the 11th  planet in the meridian solar system . Its orbit is different than the other planets in our solar system.  The surface of Quaoar is barren it consists mainly of hard rock and ice there is a light atmosphere around the planet Quaoar but it's not fit for humans. There are no life forms on the surface of Quaoar it is a dead planet and you could say the planet Quaoar is a large rock trapped in the darkness of the Kuiper belt in a orbit around our sun. \n\nThe planet Sedna is the second most reddish planetary body in the Solar System, after Mars. Although inclined by only around 11.9 degrees from the ecliptic where the eight major planets orbit, Sedna's distant orbit is extremely elliptical indicating that its formation and orbit may have been influenced by by a passing nearby star during the early years of the Solar System, when Sol formed out of a molecular cloud with many other closeby stars around 4.6 billion years ago. There is indirect evidence (an unexpectedly slow 40-day rotation) that Sedna has its own moon, which astronomers hope to confirm with the Hubble Space Telescope (more information and images from NASA. The icy object will move closer to the Sun over the next 72 years -- to 76 AUs of Sol -- before receding back towards the inner Oort Cloud. \n\nThis is about their discoveries: http://science.nasa.gov/headlines/y2005/29jul_planetx.htm\nhttp://news.bbc.co.uk/2/hi/science/nature/3511678.stm
86735
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!
1141952
Planet hunters have discovered an 'extrasolar' planet that showed evidence of oxygen.  Where oxygen occurs there should be something to produce it, because otherwise it would combine with other elements on the surface.  The evidence for oxygen was speculative, however.
58584
All the planets in our solar system
188214
Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune and Pluto....learned them in 4th grade. Kind of sticks with ya'.
53486
Well, there's nine so far - Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto.  However, scientists have discovered other planets that orbit our Sun that are even further out than Pluto!  So there's a possibility that we may update our information involving the solar system sometime in the future....
469077
Venus.\n\nThe order of the planets is... Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, Pluto (although on occasions Pluto is closer then Neptune).\n\nYou can remember the sequence using this mnemonic.. My Very Easy Method: Just Set Up Nine Planets.
9741
By size and orbit, mainly.\n\nOrbit comes first. Kepler noticed that the gap between Mars and Jupiter was wider than could have been expected, Johann Titius described a systematic and J.E. Bode formulated a rule for the distances of the planetary orbits from the sun. This rule works fine for the inner planets, the missing planet at the asteroid belt, Jupiter, Saturn and Uranus, but places Neptun on a intermediary orbit (about half the distance expectedby the Titius-Bode rule).\n\nWhen Pluto was discovered, its mean distance was about the expected value for the planet behind Uranus, which is why it was classified as a planet.\n\nWith the discovery of Sedna, Pluto now is regarded as a Kuyper Belt object rather than a regular planet.\n\n\nAsteroids come as numerous bodies occupying broadly the same orbit around the sun, without a central planet.\n\n\nBTW, the Earth-Moon system is an oddball in itself, basically a binary planet with the gravity centre between earth and moon forming the planetary orbit around the sun.\n\n\nSize, or surface gravity, is the other criterium. There is no fixed value where a planet begins and planetoids end, but 1/10th of earth gravity could be a useful rule of thumb.\n\nSeveral of the larger moons (earth's, Titan and at least for of Jupiter's moons) would qualify as planets if they had their own solar orbits rather than orbiting a heavier planet. Most of the smaller moons are de facto asteroid/planetoids caught by the  planets.
635906
The LATEST (April, 2006) planets discovered in our GALAXY -\n(1)HD2246936 b\n(2)HD33283 b\n(3)HD86081 b\n\nSedna is the latest major object to be discovered in our solar system. It has NOT been officially designated as a planet yet, nor has its name been officially designated.
186825
Yes there are nine in our solar system, and as someone else mentioned Pluto is not really meeting the requirements to be defined as a planet. But the problem is rewriting the history books which won't happen so they will leave it as a planet... a "historical planet".\n\nIf we are talking about all known planets we have discovered, there are many. Extra solar planets have been found around distant stars for several years now. Not actually seen but found by measuring that planets gravitational pull on it's star. Of course we can't get an accurate count of all planets in the universe but we can use the "Drake Equation" to get a good idea.\n\nThe Drake Equation is:\n\nN = N* fp ne fl fi fc fL\n\nN* represents the number of stars in the Milky Way Galaxy \nAnswer: Current estimates are 100 billion.\n \nfp is the fraction of stars that have planets around them \nAnswer: Current estimates range from 20% to 50%.\n\nForget about the rest of the equation because it doesn't apply (looking for intelligent life)\nKeep in mind this equation is for our galaxy. They estimate 100 billion Galaxy's in our Universe (not to mention other planets that exist in other dimensions that we have discovered as a result of trying to solve the "unified theory" of everything) so…\n\nYou do the math!!!
518523
This is somewhat an opinion question, but I'll give my opinion on the top 10 achievements:\n\n1.  First man on the moon\n2.  First mission to another planet (Mariner, Venus)\n3.  First probe to leave the solar system \n4.  Hubble Space Telescope\n5.  Voyagers I and II\n6.  Development of the Space Shuttle\n7.  Infrared Astronomical Satellite\n8.  SOHO (Sun observation satellite)\n9.  Galileo mission to Jupiter\n10. Cassini mission
139598
Don't forget the tenth planet "Xena"\n\nSome info on the planets:\n\nhttp://beaker.atspace.org/spaceglossplanets.htm
804758
Pluto: 1(2 moons nix and hydra have newly been discovered inreasing the number to 3)\nUranus: 27\nSaturn: 56\nNeptune: 13
596644
The most recent planet discovered in our our solar system is named Cedna after the Inuit goddess of the sea. It is even smaller than Pluto.
227060
I thought I discovered a new planet once. It was mostly water and I could see the mountains and rivers and everything. It was just sitting on a desk.\n\nI later learned that this is called a "globe."