hey how many planets are in space?
492408
in our solar system 12\nin our galaxy 245658421\nin whole world 87541245632156125
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!!!
380795
Tons!\n\nA moon is simply a large object that orbits a planet.\n\nThere are a total of 137 moons in our solar system. Here's the list of names and associated planets (see sources):
613963
How many moons does Saturn have? There you go- good question.
71710
The total number of known moons of Jupiter now stands at 63, currently the most of any planet in the solar system. Many additional tiny moons may exist that have not yet been discovered.
969053
More than a decade after the first planets beyond our solar system were found, astronomers have discovered about 200 of these "extrasolar planets," as they're called. Using a common-sense definition of potentially habitable planets, coupled with extensive computer simulations, scientists have calculated how many potentially habitable planets might be detected around other stars by the SIM PlanetQuest mission. ("SIM" stands for Space Interferometry Mission.) \n\nThe mission, scheduled for a launch in the next decade, will target planets with specific traits in common with Earth: a similar mass and an orbit in the "habitable zone," not too close and not too far from its parent star. With this mass and location, it's believed a planet could have liquid water on its surface and an atmosphere -- conditions considered necessary for life to gain a foothold. \n\nThe science team has shown that, in a survey of the best 120 candidate stars for hosting such planets, SIM PlanetQuest would have the sensitivity to find: \n\n-- Planets smaller than Earth around six stars \n\n-- Planets smaller than twice Earth's mass around 24 stars
408660
solar system is the system which includes the sun and the nine planets along with the satellites of each planet , asteroids , meteorites.
738374
Eight, plus three dwarf planets.
569599
According to the NASA website, there are 134.*\n\nMercury - 0\nVenus - 0\nEarth - 1\nMars - 2\nJupiter - 62\nSaturn - 31\nUranus - 24\nNeptune - 13\nPluto - 1 \n \nBut there is another website that claims there are 156.**\n\nMercury=0 \nVenus=0 \nEarth=1 \nMars=2 \nJupiter=63 \nSaturn=47 \nUranus=27 \nNeptune=13 \nPluto=3\n\nTake it for what it's worth.
973173
There are more stars than we can count.  Most of them have planets.   Most of those planets have moons.
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As of April 18th, 2006 we know of 152 planetary systems other than our own containing a total of 176 planets.  This number grows fairly frequently as more and more observations are being made.
7302
Do you really mean plants? If so there are quite a few.\nIf you meant planets then most people say 9, although there is a big controversy about what makes something a planet. We have discovered another named Sedna and a couple more that may eventually be called planets.
975767
From the planets you just mentioned.
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solar planets:\n\nmercury\nvenus\nearth\nmars\njupiter\nsaturn\nuranus\nneptune\npluto\n\nextrasolar planets:\n\nHD 117618\nHD 121504\nHD 130322\nHD 147513\nHD 149026\nHD 150706\nHD 168746\nHD 177830\nHD 179949\nHD 187123\nHD 188015\nHD 188753\nHD 188753 Ab\nHD 189733\nHD 192263\nHD 196885\nHD 202206\nHD 20367\nHD 208487\nHD 209458 b\nHD 210277\nHD 216770\nHD 2638\nHD 27894\nHD 28185\nHD 330075\nHD 40979\nHD 4208\nHD 4308\nHD 45350\nHD 46375\nHD 49674\nHD 52265\nHD 63454\nHD 6434\nHD 65216\nHD 75289\nHD 76700\nHD 83443\nHD 88133\nHD 93083\nHO Librae\nIota Draconis\nIota Horologii\nOGLE 2003-BLG-235\nOGLE-2005-BLG-390L\nOGLE-2005-BLG-390Lb\nOGLE-TR-10 b\nOGLE-TR-10b\nOGLE-TR-111b\nOGLE-TR-111c\nOGLE-TR-132b\nHD 101930\nHD 102117\nHD 102195\nHD 107146\nHD 108147\nHD 114386\nHD 114729\nHD 114762\nHD 114783\n14 Herculis\n16 Cygni\n23 Librae\n2M1207b\n51 Pegasi b\n54 Piscium\n70 Virginis b\n79 Ceti\n83 Leonis\n\ni cant remember all
537406
in our solar system: 9\n\neven though larger bodies exist in our solar system, we're too used to having 9 planets to ever change.
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There are about a couple hundred billion stars in our galaxy. The stars close to the center are not likely to have planets because of dynamical considerations (other stars pass by too frequently to have stable orbits).\n\nThe BIG question is how many planets there are per star on average. Our sun has ten planets and assorted other objects. We have found many other planets orbiting other stars, but most of those stars have only one planet (that we have detected). One has three planets that we know about. HOWEVER, the way we detect these planets favors detecting large planets that are very close to their star. Once you start to ask about planets as small as Saturn, or that are farther away than Mercury is from our sun, the methods don't work so well.\n\nThe upshot is that we really just don't know how many planets a typical star has. Some probably have none. How many have none? We don't know. How many have ten smallish planets? We don't know. At best we can guess, say 4-5 on average. This would give close to a trillion planets in our galaxy. The number could easily be a tenth of this, though.
280781
Jupiter has 63 known satellites.  Scott Shepard maintains one of the better acountings of planetary moons.